./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-broom/sll-nested-sll-twice.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda48da3-d4aa-4d83-bf5b-5bc675c06b8f/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda48da3-d4aa-4d83-bf5b-5bc675c06b8f/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda48da3-d4aa-4d83-bf5b-5bc675c06b8f/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda48da3-d4aa-4d83-bf5b-5bc675c06b8f/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/sll-nested-sll-twice.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda48da3-d4aa-4d83-bf5b-5bc675c06b8f/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda48da3-d4aa-4d83-bf5b-5bc675c06b8f/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --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 64bit --witnessprinter.graph.data.programhash f6ffaa15235a1424658c74c69505398b6d7973f6f82933a9f22a2b097e3c0057 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:09:39,694 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:09:39,816 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda48da3-d4aa-4d83-bf5b-5bc675c06b8f/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2023-11-19 07:09:39,821 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:09:39,822 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:09:39,860 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:09:39,861 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:09:39,862 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:09:39,864 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:09:39,868 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:09:39,869 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:09:39,870 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:09:39,870 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:09:39,872 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:09:39,873 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:09:39,873 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:09:39,874 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:09:39,874 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:09:39,874 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:09:39,875 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:09:39,876 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:09:39,876 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:09:39,877 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:09:39,878 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:09:39,878 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:09:39,879 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:09:39,879 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:09:39,880 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:09:39,880 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:09:39,881 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:09:39,882 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:09:39,882 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:09:39,883 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:09:39,883 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:09:39,883 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:09:39,883 INFO L153 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_eda48da3-d4aa-4d83-bf5b-5bc675c06b8f/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda48da3-d4aa-4d83-bf5b-5bc675c06b8f/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6ffaa15235a1424658c74c69505398b6d7973f6f82933a9f22a2b097e3c0057 [2023-11-19 07:09:40,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:09:40,242 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:09:40,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:09:40,246 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:09:40,246 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:09:40,248 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda48da3-d4aa-4d83-bf5b-5bc675c06b8f/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/memsafety-broom/sll-nested-sll-twice.i [2023-11-19 07:09:43,350 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:09:43,749 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:09:43,750 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda48da3-d4aa-4d83-bf5b-5bc675c06b8f/sv-benchmarks/c/memsafety-broom/sll-nested-sll-twice.i [2023-11-19 07:09:43,799 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda48da3-d4aa-4d83-bf5b-5bc675c06b8f/bin/uautomizer-verify-uCwYo4JHxu/data/2b172130c/08cfd4c7fee34a0d99501cf01ab300b0/FLAG1fece3038 [2023-11-19 07:09:43,817 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda48da3-d4aa-4d83-bf5b-5bc675c06b8f/bin/uautomizer-verify-uCwYo4JHxu/data/2b172130c/08cfd4c7fee34a0d99501cf01ab300b0 [2023-11-19 07:09:43,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:09:43,823 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:09:43,826 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:09:43,827 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:09:43,833 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:09:43,833 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:09:43" (1/1) ... [2023-11-19 07:09:43,834 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65a31293 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:43, skipping insertion in model container [2023-11-19 07:09:43,835 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:09:43" (1/1) ... [2023-11-19 07:09:43,912 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:09:44,097 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-19 07:09:44,244 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:09:44,253 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:09:44,270 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-19 07:09:44,300 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:09:44,342 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:09:44,350 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:09:44,350 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:44 WrapperNode [2023-11-19 07:09:44,351 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:09:44,352 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:09:44,352 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:09:44,352 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:09:44,361 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:44" (1/1) ... [2023-11-19 07:09:44,376 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:44" (1/1) ... [2023-11-19 07:09:44,411 INFO L138 Inliner]: procedures = 123, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 81 [2023-11-19 07:09:44,412 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:09:44,413 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:09:44,413 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:09:44,413 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:09:44,424 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:44" (1/1) ... [2023-11-19 07:09:44,425 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:44" (1/1) ... [2023-11-19 07:09:44,435 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:44" (1/1) ... [2023-11-19 07:09:44,436 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:44" (1/1) ... [2023-11-19 07:09:44,445 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:44" (1/1) ... [2023-11-19 07:09:44,451 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:44" (1/1) ... [2023-11-19 07:09:44,454 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:44" (1/1) ... [2023-11-19 07:09:44,456 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:44" (1/1) ... [2023-11-19 07:09:44,472 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:09:44,478 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:09:44,478 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:09:44,478 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:09:44,479 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:44" (1/1) ... [2023-11-19 07:09:44,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:09:44,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda48da3-d4aa-4d83-bf5b-5bc675c06b8f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:09:44,510 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda48da3-d4aa-4d83-bf5b-5bc675c06b8f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:09:44,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda48da3-d4aa-4d83-bf5b-5bc675c06b8f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:09:44,560 INFO L130 BoogieDeclarations]: Found specification of procedure loop_internal [2023-11-19 07:09:44,561 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_internal [2023-11-19 07:09:44,562 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero_internal [2023-11-19 07:09:44,562 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero_internal [2023-11-19 07:09:44,562 INFO L130 BoogieDeclarations]: Found specification of procedure create_internal [2023-11-19 07:09:44,562 INFO L138 BoogieDeclarations]: Found implementation of procedure create_internal [2023-11-19 07:09:44,563 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2023-11-19 07:09:44,563 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2023-11-19 07:09:44,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:09:44,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 07:09:44,563 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_internal [2023-11-19 07:09:44,564 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_internal [2023-11-19 07:09:44,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 07:09:44,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:09:44,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:09:44,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:09:44,762 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:09:44,766 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:09:45,312 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:09:45,322 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:09:45,323 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-19 07:09:45,327 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:09:45 BoogieIcfgContainer [2023-11-19 07:09:45,328 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:09:45,331 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:09:45,331 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:09:45,335 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:09:45,335 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:09:43" (1/3) ... [2023-11-19 07:09:45,336 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@269b798c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:09:45, skipping insertion in model container [2023-11-19 07:09:45,336 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:44" (2/3) ... [2023-11-19 07:09:45,337 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@269b798c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:09:45, skipping insertion in model container [2023-11-19 07:09:45,337 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:09:45" (3/3) ... [2023-11-19 07:09:45,338 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-nested-sll-twice.i [2023-11-19 07:09:45,358 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:09:45,359 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 51 error locations. [2023-11-19 07:09:45,411 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:09:45,419 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;@72396abe, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:09:45,419 INFO L358 AbstractCegarLoop]: Starting to check reachability of 51 error locations. [2023-11-19 07:09:45,424 INFO L276 IsEmpty]: Start isEmpty. Operand has 143 states, 74 states have (on average 1.8513513513513513) internal successors, (137), 125 states have internal predecessors, (137), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 07:09:45,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-19 07:09:45,432 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:09:45,432 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:09:45,433 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-19 07:09:45,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:09:45,439 INFO L85 PathProgramCache]: Analyzing trace with hash 57486637, now seen corresponding path program 1 times [2023-11-19 07:09:45,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:09:45,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435606848] [2023-11-19 07:09:45,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:09:45,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:09:45,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:45,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:09:45,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:09:45,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435606848] [2023-11-19 07:09:45,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435606848] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:09:45,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:09:45,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:09:45,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446366968] [2023-11-19 07:09:45,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:09:45,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:09:45,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:09:45,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:09:45,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:09:45,719 INFO L87 Difference]: Start difference. First operand has 143 states, 74 states have (on average 1.8513513513513513) internal successors, (137), 125 states have internal predecessors, (137), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:09:45,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:09:45,847 INFO L93 Difference]: Finished difference Result 140 states and 152 transitions. [2023-11-19 07:09:45,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:09:45,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-19 07:09:45,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:09:45,859 INFO L225 Difference]: With dead ends: 140 [2023-11-19 07:09:45,859 INFO L226 Difference]: Without dead ends: 138 [2023-11-19 07:09:45,861 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 [2023-11-19 07:09:45,865 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 8 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:09:45,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 239 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:09:45,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-11-19 07:09:45,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2023-11-19 07:09:45,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 73 states have (on average 1.726027397260274) internal successors, (126), 120 states have internal predecessors, (126), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 07:09:45,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 150 transitions. [2023-11-19 07:09:45,917 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 150 transitions. Word has length 5 [2023-11-19 07:09:45,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:09:45,918 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 150 transitions. [2023-11-19 07:09:45,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:09:45,919 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 150 transitions. [2023-11-19 07:09:45,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-19 07:09:45,919 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:09:45,920 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:09:45,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:09:45,920 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-19 07:09:45,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:09:45,921 INFO L85 PathProgramCache]: Analyzing trace with hash 57486638, now seen corresponding path program 1 times [2023-11-19 07:09:45,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:09:45,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992118739] [2023-11-19 07:09:45,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:09:45,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:09:45,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:46,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:09:46,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:09:46,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992118739] [2023-11-19 07:09:46,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992118739] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:09:46,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:09:46,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:09:46,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498752973] [2023-11-19 07:09:46,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:09:46,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:09:46,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:09:46,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:09:46,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:09:46,095 INFO L87 Difference]: Start difference. First operand 138 states and 150 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:09:46,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:09:46,204 INFO L93 Difference]: Finished difference Result 135 states and 147 transitions. [2023-11-19 07:09:46,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:09:46,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-19 07:09:46,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:09:46,207 INFO L225 Difference]: With dead ends: 135 [2023-11-19 07:09:46,207 INFO L226 Difference]: Without dead ends: 135 [2023-11-19 07:09:46,208 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 [2023-11-19 07:09:46,209 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 5 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:09:46,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 243 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:09:46,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-19 07:09:46,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2023-11-19 07:09:46,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 73 states have (on average 1.6849315068493151) internal successors, (123), 117 states have internal predecessors, (123), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 07:09:46,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 147 transitions. [2023-11-19 07:09:46,228 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 147 transitions. Word has length 5 [2023-11-19 07:09:46,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:09:46,228 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 147 transitions. [2023-11-19 07:09:46,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:09:46,229 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 147 transitions. [2023-11-19 07:09:46,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 07:09:46,230 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:09:46,230 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:09:46,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:09:46,231 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting alloc_and_zero_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-19 07:09:46,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:09:46,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1628966071, now seen corresponding path program 1 times [2023-11-19 07:09:46,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:09:46,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114638722] [2023-11-19 07:09:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:09:46,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:09:46,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:46,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:09:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:46,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:09:46,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:09:46,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114638722] [2023-11-19 07:09:46,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114638722] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:09:46,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:09:46,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:09:46,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976569136] [2023-11-19 07:09:46,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:09:46,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:09:46,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:09:46,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:09:46,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:09:46,413 INFO L87 Difference]: Start difference. First operand 135 states and 147 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 07:09:46,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:09:46,748 INFO L93 Difference]: Finished difference Result 147 states and 161 transitions. [2023-11-19 07:09:46,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:09:46,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-19 07:09:46,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:09:46,759 INFO L225 Difference]: With dead ends: 147 [2023-11-19 07:09:46,759 INFO L226 Difference]: Without dead ends: 147 [2023-11-19 07:09:46,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:09:46,767 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 25 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:09:46,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 235 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:09:46,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-11-19 07:09:46,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 134. [2023-11-19 07:09:46,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 73 states have (on average 1.6712328767123288) internal successors, (122), 116 states have internal predecessors, (122), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 07:09:46,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 146 transitions. [2023-11-19 07:09:46,796 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 146 transitions. Word has length 15 [2023-11-19 07:09:46,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:09:46,796 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 146 transitions. [2023-11-19 07:09:46,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 07:09:46,796 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 146 transitions. [2023-11-19 07:09:46,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 07:09:46,797 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:09:46,797 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:09:46,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:09:46,798 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting alloc_and_zero_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-19 07:09:46,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:09:46,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1628966072, now seen corresponding path program 1 times [2023-11-19 07:09:46,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:09:46,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488555909] [2023-11-19 07:09:46,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:09:46,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:09:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:46,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:09:46,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:47,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:09:47,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:09:47,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488555909] [2023-11-19 07:09:47,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488555909] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:09:47,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:09:47,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:09:47,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239384452] [2023-11-19 07:09:47,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:09:47,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:09:47,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:09:47,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:09:47,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:09:47,021 INFO L87 Difference]: Start difference. First operand 134 states and 146 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 07:09:47,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:09:47,234 INFO L93 Difference]: Finished difference Result 146 states and 160 transitions. [2023-11-19 07:09:47,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:09:47,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-19 07:09:47,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:09:47,236 INFO L225 Difference]: With dead ends: 146 [2023-11-19 07:09:47,236 INFO L226 Difference]: Without dead ends: 146 [2023-11-19 07:09:47,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:09:47,247 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 24 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:09:47,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 240 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:09:47,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-11-19 07:09:47,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 133. [2023-11-19 07:09:47,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 73 states have (on average 1.6575342465753424) internal successors, (121), 115 states have internal predecessors, (121), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 07:09:47,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 145 transitions. [2023-11-19 07:09:47,277 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 145 transitions. Word has length 15 [2023-11-19 07:09:47,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:09:47,277 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 145 transitions. [2023-11-19 07:09:47,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 07:09:47,278 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 145 transitions. [2023-11-19 07:09:47,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-19 07:09:47,279 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:09:47,280 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:09:47,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:09:47,280 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-19 07:09:47,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:09:47,281 INFO L85 PathProgramCache]: Analyzing trace with hash -614116727, now seen corresponding path program 1 times [2023-11-19 07:09:47,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:09:47,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738529524] [2023-11-19 07:09:47,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:09:47,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:09:47,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:47,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:09:47,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:47,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-19 07:09:47,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:47,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-19 07:09:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:47,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:09:47,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:09:47,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738529524] [2023-11-19 07:09:47,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738529524] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:09:47,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:09:47,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-19 07:09:47,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898431794] [2023-11-19 07:09:47,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:09:47,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:09:47,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:09:47,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:09:47,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:09:47,788 INFO L87 Difference]: Start difference. First operand 133 states and 145 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:09:48,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:09:48,512 INFO L93 Difference]: Finished difference Result 174 states and 195 transitions. [2023-11-19 07:09:48,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:09:48,512 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2023-11-19 07:09:48,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:09:48,514 INFO L225 Difference]: With dead ends: 174 [2023-11-19 07:09:48,514 INFO L226 Difference]: Without dead ends: 174 [2023-11-19 07:09:48,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:09:48,515 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 62 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:09:48,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 486 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 07:09:48,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-11-19 07:09:48,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 149. [2023-11-19 07:09:48,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 88 states have (on average 1.6590909090909092) internal successors, (146), 126 states have internal predecessors, (146), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (17), 17 states have call predecessors, (17), 13 states have call successors, (17) [2023-11-19 07:09:48,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 176 transitions. [2023-11-19 07:09:48,542 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 176 transitions. Word has length 25 [2023-11-19 07:09:48,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:09:48,542 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 176 transitions. [2023-11-19 07:09:48,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:09:48,543 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 176 transitions. [2023-11-19 07:09:48,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-19 07:09:48,544 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:09:48,544 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:09:48,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:09:48,545 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-19 07:09:48,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:09:48,546 INFO L85 PathProgramCache]: Analyzing trace with hash -614116726, now seen corresponding path program 1 times [2023-11-19 07:09:48,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:09:48,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194760532] [2023-11-19 07:09:48,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:09:48,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:09:48,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:48,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:09:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:48,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-19 07:09:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:49,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-19 07:09:49,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:49,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:09:49,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:09:49,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194760532] [2023-11-19 07:09:49,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194760532] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:09:49,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:09:49,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-19 07:09:49,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993768087] [2023-11-19 07:09:49,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:09:49,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:09:49,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:09:49,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:09:49,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:09:49,209 INFO L87 Difference]: Start difference. First operand 149 states and 176 transitions. Second operand has 12 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:09:49,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:09:49,912 INFO L93 Difference]: Finished difference Result 188 states and 225 transitions. [2023-11-19 07:09:49,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:09:49,913 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2023-11-19 07:09:49,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:09:49,915 INFO L225 Difference]: With dead ends: 188 [2023-11-19 07:09:49,915 INFO L226 Difference]: Without dead ends: 188 [2023-11-19 07:09:49,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:09:49,916 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 78 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:09:49,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 607 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 07:09:49,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-19 07:09:49,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 167. [2023-11-19 07:09:49,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 102 states have (on average 1.607843137254902) internal successors, (164), 140 states have internal predecessors, (164), 17 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (24), 21 states have call predecessors, (24), 17 states have call successors, (24) [2023-11-19 07:09:49,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 205 transitions. [2023-11-19 07:09:49,935 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 205 transitions. Word has length 25 [2023-11-19 07:09:49,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:09:49,935 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 205 transitions. [2023-11-19 07:09:49,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:09:49,936 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 205 transitions. [2023-11-19 07:09:49,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-19 07:09:49,937 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:09:49,937 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:09:49,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:09:49,943 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting create_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-19 07:09:49,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:09:49,943 INFO L85 PathProgramCache]: Analyzing trace with hash -687002123, now seen corresponding path program 1 times [2023-11-19 07:09:49,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:09:49,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774055226] [2023-11-19 07:09:49,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:09:49,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:09:49,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:50,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:09:50,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:50,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-19 07:09:50,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:50,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-19 07:09:50,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:50,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:09:50,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:09:50,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774055226] [2023-11-19 07:09:50,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774055226] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:09:50,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812379243] [2023-11-19 07:09:50,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:09:50,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:09:50,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda48da3-d4aa-4d83-bf5b-5bc675c06b8f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:09:50,241 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda48da3-d4aa-4d83-bf5b-5bc675c06b8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:09:50,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda48da3-d4aa-4d83-bf5b-5bc675c06b8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:09:50,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:50,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 07:09:50,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:09:50,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:09:50,595 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base 1))) is different from true [2023-11-19 07:09:50,645 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-19 07:09:50,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-19 07:09:50,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-11-19 07:09:50,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:09:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:09:50,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812379243] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:09:50,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:09:50,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 11 [2023-11-19 07:09:50,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37829737] [2023-11-19 07:09:50,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:09:50,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:09:50,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:09:50,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:09:50,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=84, Unknown=1, NotChecked=18, Total=132 [2023-11-19 07:09:50,883 INFO L87 Difference]: Start difference. First operand 167 states and 205 transitions. Second operand has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 07:09:51,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:09:51,483 INFO L93 Difference]: Finished difference Result 182 states and 223 transitions. [2023-11-19 07:09:51,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:09:51,484 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 28 [2023-11-19 07:09:51,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:09:51,486 INFO L225 Difference]: With dead ends: 182 [2023-11-19 07:09:51,486 INFO L226 Difference]: Without dead ends: 182 [2023-11-19 07:09:51,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=185, Unknown=1, NotChecked=28, Total=272 [2023-11-19 07:09:51,487 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 111 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:09:51,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 470 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 514 Invalid, 0 Unknown, 167 Unchecked, 0.5s Time] [2023-11-19 07:09:51,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-11-19 07:09:51,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 168. [2023-11-19 07:09:51,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 103 states have (on average 1.6019417475728155) internal successors, (165), 140 states have internal predecessors, (165), 18 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (25), 22 states have call predecessors, (25), 18 states have call successors, (25) [2023-11-19 07:09:51,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 208 transitions. [2023-11-19 07:09:51,498 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 208 transitions. Word has length 28 [2023-11-19 07:09:51,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:09:51,499 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 208 transitions. [2023-11-19 07:09:51,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 07:09:51,499 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 208 transitions. [2023-11-19 07:09:51,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-19 07:09:51,500 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:09:51,500 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:09:51,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda48da3-d4aa-4d83-bf5b-5bc675c06b8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:09:51,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda48da3-d4aa-4d83-bf5b-5bc675c06b8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:09:51,729 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting create_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-19 07:09:51,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:09:51,730 INFO L85 PathProgramCache]: Analyzing trace with hash -687002122, now seen corresponding path program 1 times [2023-11-19 07:09:51,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:09:51,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353436921] [2023-11-19 07:09:51,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:09:51,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:09:51,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:51,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:09:51,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:51,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-19 07:09:51,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:52,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-19 07:09:52,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:52,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:09:52,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:09:52,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353436921] [2023-11-19 07:09:52,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353436921] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:09:52,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314033616] [2023-11-19 07:09:52,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:09:52,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:09:52,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda48da3-d4aa-4d83-bf5b-5bc675c06b8f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:09:52,141 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda48da3-d4aa-4d83-bf5b-5bc675c06b8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:09:52,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda48da3-d4aa-4d83-bf5b-5bc675c06b8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:09:52,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:52,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-19 07:09:52,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:09:52,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:09:52,356 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base 8) |c_#length|)) is different from true [2023-11-19 07:09:52,378 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-19 07:09:52,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-19 07:09:52,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-11-19 07:09:52,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:09:52,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314033616] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:09:52,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:09:52,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2023-11-19 07:09:52,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882935135] [2023-11-19 07:09:52,478 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:09:52,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:09:52,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:09:52,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:09:52,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=199, Unknown=1, NotChecked=28, Total=272 [2023-11-19 07:09:52,480 INFO L87 Difference]: Start difference. First operand 168 states and 208 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-19 07:09:53,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:09:53,130 INFO L93 Difference]: Finished difference Result 184 states and 225 transitions. [2023-11-19 07:09:53,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:09:53,131 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 28 [2023-11-19 07:09:53,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:09:53,132 INFO L225 Difference]: With dead ends: 184 [2023-11-19 07:09:53,133 INFO L226 Difference]: Without dead ends: 184 [2023-11-19 07:09:53,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=312, Unknown=1, NotChecked=36, Total=420 [2023-11-19 07:09:53,134 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 98 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:09:53,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 553 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 637 Invalid, 0 Unknown, 169 Unchecked, 0.5s Time] [2023-11-19 07:09:53,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-11-19 07:09:53,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 170. [2023-11-19 07:09:53,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 105 states have (on average 1.5809523809523809) internal successors, (166), 142 states have internal predecessors, (166), 18 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (25), 22 states have call predecessors, (25), 18 states have call successors, (25) [2023-11-19 07:09:53,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 209 transitions. [2023-11-19 07:09:53,148 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 209 transitions. Word has length 28 [2023-11-19 07:09:53,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:09:53,148 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 209 transitions. [2023-11-19 07:09:53,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-19 07:09:53,149 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 209 transitions. [2023-11-19 07:09:53,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-19 07:09:53,151 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:09:53,151 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2023-11-19 07:09:53,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda48da3-d4aa-4d83-bf5b-5bc675c06b8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:09:53,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda48da3-d4aa-4d83-bf5b-5bc675c06b8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:09:53,367 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-19 07:09:53,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:09:53,368 INFO L85 PathProgramCache]: Analyzing trace with hash -742476013, now seen corresponding path program 1 times [2023-11-19 07:09:53,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:09:53,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954438293] [2023-11-19 07:09:53,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:09:53,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:09:53,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:53,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:09:53,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:53,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-19 07:09:53,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:53,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-19 07:09:53,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:53,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 07:09:53,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:54,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:09:54,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:09:54,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954438293] [2023-11-19 07:09:54,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954438293] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:09:54,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808045909] [2023-11-19 07:09:54,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:09:54,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:09:54,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda48da3-d4aa-4d83-bf5b-5bc675c06b8f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:09:54,194 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda48da3-d4aa-4d83-bf5b-5bc675c06b8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:09:54,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda48da3-d4aa-4d83-bf5b-5bc675c06b8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:09:54,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:54,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 07:09:54,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:09:54,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:09:54,376 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-11-19 07:09:54,433 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base 1))) is different from true [2023-11-19 07:09:54,819 INFO L349 Elim1Store]: treesize reduction 104, result has 34.2 percent of original size [2023-11-19 07:09:54,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 40 treesize of output 104 [2023-11-19 07:09:56,048 INFO L349 Elim1Store]: treesize reduction 366, result has 29.8 percent of original size [2023-11-19 07:09:56,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 26 case distinctions, treesize of input 86 treesize of output 280 [2023-11-19 07:09:59,673 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:09:59,763 INFO L349 Elim1Store]: treesize reduction 89, result has 37.3 percent of original size [2023-11-19 07:09:59,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 145 treesize of output 173 [2023-11-19 07:10:02,611 INFO L349 Elim1Store]: treesize reduction 443, result has 27.0 percent of original size [2023-11-19 07:10:02,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 31 case distinctions, treesize of input 225 treesize of output 377