./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/heap-manipulation/dll_of_dll-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 2329fc70 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_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/dll_of_dll-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0eca46c14885d62179341dcc13b398752af03e020a80dcf533f4c9afc7372707 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 14:24:02,307 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 14:24:02,309 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 14:24:02,326 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 14:24:02,327 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 14:24:02,328 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 14:24:02,329 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 14:24:02,330 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 14:24:02,332 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 14:24:02,332 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 14:24:02,333 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 14:24:02,334 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 14:24:02,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 14:24:02,335 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 14:24:02,336 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 14:24:02,337 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 14:24:02,338 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 14:24:02,339 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 14:24:02,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 14:24:02,342 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 14:24:02,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 14:24:02,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 14:24:02,345 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 14:24:02,346 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 14:24:02,349 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 14:24:02,349 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 14:24:02,350 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 14:24:02,350 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 14:24:02,351 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 14:24:02,352 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 14:24:02,352 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 14:24:02,352 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 14:24:02,353 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 14:24:02,354 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 14:24:02,355 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 14:24:02,355 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 14:24:02,355 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 14:24:02,356 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 14:24:02,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 14:24:02,356 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 14:24:02,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 14:24:02,358 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2022-12-13 14:24:02,377 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 14:24:02,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 14:24:02,378 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 14:24:02,378 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 14:24:02,378 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 14:24:02,379 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 14:24:02,379 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 14:24:02,379 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 14:24:02,380 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 14:24:02,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 14:24:02,380 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 14:24:02,380 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 14:24:02,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 14:24:02,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 14:24:02,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 14:24:02,381 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 14:24:02,381 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 14:24:02,381 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 14:24:02,381 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 14:24:02,381 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 14:24:02,381 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 14:24:02,382 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 14:24:02,382 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 14:24:02,382 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 14:24:02,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:24:02,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 14:24:02,382 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 14:24:02,383 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 14:24:02,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 14:24:02,383 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 14:24:02,383 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 14:24:02,383 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 14:24:02,383 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 14:24:02,383 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0eca46c14885d62179341dcc13b398752af03e020a80dcf533f4c9afc7372707 [2022-12-13 14:24:02,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 14:24:02,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 14:24:02,583 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 14:24:02,584 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 14:24:02,584 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 14:24:02,585 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/heap-manipulation/dll_of_dll-2.i [2022-12-13 14:24:05,200 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 14:24:05,365 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 14:24:05,366 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/sv-benchmarks/c/heap-manipulation/dll_of_dll-2.i [2022-12-13 14:24:05,374 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/data/b7b8af2b8/c4a2f1f1fa3f4611965713fb235baf6c/FLAG5d20f6a38 [2022-12-13 14:24:05,384 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/data/b7b8af2b8/c4a2f1f1fa3f4611965713fb235baf6c [2022-12-13 14:24:05,386 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 14:24:05,387 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 14:24:05,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 14:24:05,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 14:24:05,391 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 14:24:05,391 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:24:05" (1/1) ... [2022-12-13 14:24:05,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66474079 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:24:05, skipping insertion in model container [2022-12-13 14:24:05,392 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:24:05" (1/1) ... [2022-12-13 14:24:05,397 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 14:24:05,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:24:05,589 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/sv-benchmarks/c/heap-manipulation/dll_of_dll-2.i[22634,22647] [2022-12-13 14:24:05,622 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:24:05,629 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 14:24:05,648 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/sv-benchmarks/c/heap-manipulation/dll_of_dll-2.i[22634,22647] [2022-12-13 14:24:05,661 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:24:05,680 INFO L208 MainTranslator]: Completed translation [2022-12-13 14:24:05,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:24:05 WrapperNode [2022-12-13 14:24:05,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 14:24:05,681 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 14:24:05,681 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 14:24:05,681 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 14:24:05,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:24:05" (1/1) ... [2022-12-13 14:24:05,697 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:24:05" (1/1) ... [2022-12-13 14:24:05,716 INFO L138 Inliner]: procedures = 140, calls = 94, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 234 [2022-12-13 14:24:05,716 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 14:24:05,717 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 14:24:05,717 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 14:24:05,717 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 14:24:05,724 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:24:05" (1/1) ... [2022-12-13 14:24:05,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:24:05" (1/1) ... [2022-12-13 14:24:05,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:24:05" (1/1) ... [2022-12-13 14:24:05,728 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:24:05" (1/1) ... [2022-12-13 14:24:05,736 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:24:05" (1/1) ... [2022-12-13 14:24:05,741 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:24:05" (1/1) ... [2022-12-13 14:24:05,743 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:24:05" (1/1) ... [2022-12-13 14:24:05,744 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:24:05" (1/1) ... [2022-12-13 14:24:05,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 14:24:05,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 14:24:05,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 14:24:05,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 14:24:05,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:24:05" (1/1) ... [2022-12-13 14:24:05,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:24:05,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:24:05,770 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 14:24:05,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 14:24:05,806 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2022-12-13 14:24:05,806 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2022-12-13 14:24:05,806 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_base [2022-12-13 14:24:05,807 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_base [2022-12-13 14:24:05,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 14:24:05,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 14:24:05,807 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_master [2022-12-13 14:24:05,807 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_master [2022-12-13 14:24:05,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 14:24:05,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 14:24:05,808 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-12-13 14:24:05,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-12-13 14:24:05,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 14:24:05,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 14:24:05,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-13 14:24:05,808 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_generic [2022-12-13 14:24:05,809 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_generic [2022-12-13 14:24:05,809 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_slave [2022-12-13 14:24:05,809 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_slave [2022-12-13 14:24:05,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 14:24:05,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 14:24:05,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 14:24:05,926 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 14:24:05,928 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 14:24:06,389 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 14:24:06,395 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 14:24:06,395 INFO L300 CfgBuilder]: Removed 38 assume(true) statements. [2022-12-13 14:24:06,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:24:06 BoogieIcfgContainer [2022-12-13 14:24:06,397 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 14:24:06,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 14:24:06,398 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 14:24:06,401 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 14:24:06,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 02:24:05" (1/3) ... [2022-12-13 14:24:06,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54cd6558 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:24:06, skipping insertion in model container [2022-12-13 14:24:06,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:24:05" (2/3) ... [2022-12-13 14:24:06,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54cd6558 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:24:06, skipping insertion in model container [2022-12-13 14:24:06,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:24:06" (3/3) ... [2022-12-13 14:24:06,403 INFO L112 eAbstractionObserver]: Analyzing ICFG dll_of_dll-2.i [2022-12-13 14:24:06,417 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 14:24:06,417 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 98 error locations. [2022-12-13 14:24:06,452 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:24:06,457 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;@152e0e2a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:24:06,457 INFO L358 AbstractCegarLoop]: Starting to check reachability of 98 error locations. [2022-12-13 14:24:06,460 INFO L276 IsEmpty]: Start isEmpty. Operand has 271 states, 142 states have (on average 2.1619718309859155) internal successors, (307), 259 states have internal predecessors, (307), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-13 14:24:06,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 14:24:06,465 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:24:06,465 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:24:06,466 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ##fun~$Pointer$~TO~VOIDErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [dll_insert_masterErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 95 more)] === [2022-12-13 14:24:06,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:24:06,469 INFO L85 PathProgramCache]: Analyzing trace with hash -853608627, now seen corresponding path program 1 times [2022-12-13 14:24:06,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:24:06,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633506896] [2022-12-13 14:24:06,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:24:06,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:24:06,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:06,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:24:06,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:24:06,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633506896] [2022-12-13 14:24:06,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633506896] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:24:06,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:24:06,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:24:06,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874184542] [2022-12-13 14:24:06,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:24:06,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 14:24:06,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:24:06,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 14:24:06,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 14:24:06,655 INFO L87 Difference]: Start difference. First operand has 271 states, 142 states have (on average 2.1619718309859155) internal successors, (307), 259 states have internal predecessors, (307), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:06,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:24:06,680 INFO L93 Difference]: Finished difference Result 269 states and 299 transitions. [2022-12-13 14:24:06,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 14:24:06,682 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-13 14:24:06,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:24:06,689 INFO L225 Difference]: With dead ends: 269 [2022-12-13 14:24:06,689 INFO L226 Difference]: Without dead ends: 267 [2022-12-13 14:24:06,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 14:24:06,693 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:24:06,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:24:06,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-12-13 14:24:06,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2022-12-13 14:24:06,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 140 states have (on average 1.8785714285714286) internal successors, (263), 255 states have internal predecessors, (263), 24 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 14:24:06,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 297 transitions. [2022-12-13 14:24:06,728 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 297 transitions. Word has length 9 [2022-12-13 14:24:06,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:24:06,729 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 297 transitions. [2022-12-13 14:24:06,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:06,729 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 297 transitions. [2022-12-13 14:24:06,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 14:24:06,729 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:24:06,729 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:24:06,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 14:24:06,730 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ##fun~$Pointer$~TO~VOIDErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [dll_insert_masterErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 95 more)] === [2022-12-13 14:24:06,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:24:06,730 INFO L85 PathProgramCache]: Analyzing trace with hash -853608565, now seen corresponding path program 1 times [2022-12-13 14:24:06,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:24:06,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053923869] [2022-12-13 14:24:06,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:24:06,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:24:06,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:24:06,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:24:06,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053923869] [2022-12-13 14:24:06,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053923869] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:24:06,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:24:06,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:24:06,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429683501] [2022-12-13 14:24:06,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:24:06,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:24:06,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:24:06,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:24:06,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:24:06,807 INFO L87 Difference]: Start difference. First operand 267 states and 297 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:06,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:24:06,954 INFO L93 Difference]: Finished difference Result 267 states and 299 transitions. [2022-12-13 14:24:06,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:24:06,954 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-13 14:24:06,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:24:06,956 INFO L225 Difference]: With dead ends: 267 [2022-12-13 14:24:06,956 INFO L226 Difference]: Without dead ends: 267 [2022-12-13 14:24:06,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:24:06,957 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 23 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:24:06,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 463 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:24:06,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-12-13 14:24:06,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 265. [2022-12-13 14:24:06,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 140 states have (on average 1.8642857142857143) internal successors, (261), 253 states have internal predecessors, (261), 24 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 14:24:06,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 295 transitions. [2022-12-13 14:24:06,976 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 295 transitions. Word has length 9 [2022-12-13 14:24:06,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:24:06,976 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 295 transitions. [2022-12-13 14:24:06,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:06,976 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 295 transitions. [2022-12-13 14:24:06,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 14:24:06,977 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:24:06,977 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:24:06,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 14:24:06,977 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ##fun~$Pointer$~TO~VOIDErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [dll_insert_masterErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 95 more)] === [2022-12-13 14:24:06,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:24:06,978 INFO L85 PathProgramCache]: Analyzing trace with hash -853608564, now seen corresponding path program 1 times [2022-12-13 14:24:06,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:24:06,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107436322] [2022-12-13 14:24:06,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:24:06,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:24:07,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:07,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:24:07,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:24:07,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107436322] [2022-12-13 14:24:07,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107436322] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:24:07,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:24:07,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 14:24:07,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13808865] [2022-12-13 14:24:07,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:24:07,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:24:07,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:24:07,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:24:07,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:24:07,155 INFO L87 Difference]: Start difference. First operand 265 states and 295 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:07,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:24:07,242 INFO L93 Difference]: Finished difference Result 291 states and 329 transitions. [2022-12-13 14:24:07,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:24:07,253 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-13 14:24:07,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:24:07,255 INFO L225 Difference]: With dead ends: 291 [2022-12-13 14:24:07,255 INFO L226 Difference]: Without dead ends: 291 [2022-12-13 14:24:07,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 14:24:07,257 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 19 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:24:07,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 1200 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:24:07,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-12-13 14:24:07,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 283. [2022-12-13 14:24:07,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 151 states have (on average 1.8278145695364238) internal successors, (276), 264 states have internal predecessors, (276), 29 states have call successors, (29), 8 states have call predecessors, (29), 7 states have return successors, (18), 13 states have call predecessors, (18), 15 states have call successors, (18) [2022-12-13 14:24:07,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 323 transitions. [2022-12-13 14:24:07,273 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 323 transitions. Word has length 9 [2022-12-13 14:24:07,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:24:07,274 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 323 transitions. [2022-12-13 14:24:07,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:07,274 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 323 transitions. [2022-12-13 14:24:07,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 14:24:07,274 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:24:07,275 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:24:07,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 14:24:07,275 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting dll_insert_masterErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [dll_insert_masterErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 95 more)] === [2022-12-13 14:24:07,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:24:07,276 INFO L85 PathProgramCache]: Analyzing trace with hash 33414869, now seen corresponding path program 1 times [2022-12-13 14:24:07,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:24:07,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115627517] [2022-12-13 14:24:07,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:24:07,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:24:07,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:07,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:24:07,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:24:07,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115627517] [2022-12-13 14:24:07,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115627517] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:24:07,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:24:07,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:24:07,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147305760] [2022-12-13 14:24:07,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:24:07,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:24:07,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:24:07,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:24:07,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:24:07,322 INFO L87 Difference]: Start difference. First operand 283 states and 323 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:07,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:24:07,444 INFO L93 Difference]: Finished difference Result 280 states and 320 transitions. [2022-12-13 14:24:07,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:24:07,445 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-13 14:24:07,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:24:07,446 INFO L225 Difference]: With dead ends: 280 [2022-12-13 14:24:07,446 INFO L226 Difference]: Without dead ends: 280 [2022-12-13 14:24:07,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:24:07,448 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 20 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:24:07,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 460 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:24:07,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-12-13 14:24:07,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2022-12-13 14:24:07,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 151 states have (on average 1.8079470198675496) internal successors, (273), 261 states have internal predecessors, (273), 29 states have call successors, (29), 8 states have call predecessors, (29), 7 states have return successors, (18), 13 states have call predecessors, (18), 15 states have call successors, (18) [2022-12-13 14:24:07,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 320 transitions. [2022-12-13 14:24:07,461 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 320 transitions. Word has length 11 [2022-12-13 14:24:07,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:24:07,462 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 320 transitions. [2022-12-13 14:24:07,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:07,462 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 320 transitions. [2022-12-13 14:24:07,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 14:24:07,463 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:24:07,463 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:24:07,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 14:24:07,463 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting dll_insert_masterErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [dll_insert_masterErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 95 more)] === [2022-12-13 14:24:07,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:24:07,464 INFO L85 PathProgramCache]: Analyzing trace with hash 33414870, now seen corresponding path program 1 times [2022-12-13 14:24:07,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:24:07,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423826270] [2022-12-13 14:24:07,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:24:07,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:24:07,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:07,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:24:07,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:24:07,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423826270] [2022-12-13 14:24:07,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423826270] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:24:07,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:24:07,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:24:07,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073937022] [2022-12-13 14:24:07,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:24:07,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:24:07,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:24:07,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:24:07,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:24:07,529 INFO L87 Difference]: Start difference. First operand 280 states and 320 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:07,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:24:07,640 INFO L93 Difference]: Finished difference Result 277 states and 317 transitions. [2022-12-13 14:24:07,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:24:07,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-13 14:24:07,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:24:07,642 INFO L225 Difference]: With dead ends: 277 [2022-12-13 14:24:07,642 INFO L226 Difference]: Without dead ends: 277 [2022-12-13 14:24:07,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:24:07,643 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 17 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:24:07,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 465 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:24:07,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-12-13 14:24:07,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2022-12-13 14:24:07,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 151 states have (on average 1.7880794701986755) internal successors, (270), 258 states have internal predecessors, (270), 29 states have call successors, (29), 8 states have call predecessors, (29), 7 states have return successors, (18), 13 states have call predecessors, (18), 15 states have call successors, (18) [2022-12-13 14:24:07,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 317 transitions. [2022-12-13 14:24:07,653 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 317 transitions. Word has length 11 [2022-12-13 14:24:07,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:24:07,653 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 317 transitions. [2022-12-13 14:24:07,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:07,653 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 317 transitions. [2022-12-13 14:24:07,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-13 14:24:07,654 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:24:07,654 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:24:07,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 14:24:07,654 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting dll_insert_masterErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [dll_insert_masterErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 95 more)] === [2022-12-13 14:24:07,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:24:07,655 INFO L85 PathProgramCache]: Analyzing trace with hash -226556130, now seen corresponding path program 1 times [2022-12-13 14:24:07,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:24:07,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279961223] [2022-12-13 14:24:07,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:24:07,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:24:07,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:24:07,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:24:07,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279961223] [2022-12-13 14:24:07,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279961223] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:24:07,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:24:07,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 14:24:07,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322880999] [2022-12-13 14:24:07,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:24:07,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 14:24:07,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:24:07,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 14:24:07,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 14:24:07,839 INFO L87 Difference]: Start difference. First operand 277 states and 317 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:08,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:24:08,165 INFO L93 Difference]: Finished difference Result 300 states and 343 transitions. [2022-12-13 14:24:08,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 14:24:08,165 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-13 14:24:08,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:24:08,167 INFO L225 Difference]: With dead ends: 300 [2022-12-13 14:24:08,167 INFO L226 Difference]: Without dead ends: 300 [2022-12-13 14:24:08,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 14:24:08,168 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 115 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 14:24:08,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 1153 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 14:24:08,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-12-13 14:24:08,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 289. [2022-12-13 14:24:08,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 162 states have (on average 1.7469135802469136) internal successors, (283), 268 states have internal predecessors, (283), 30 states have call successors, (30), 10 states have call predecessors, (30), 7 states have return successors, (19), 13 states have call predecessors, (19), 16 states have call successors, (19) [2022-12-13 14:24:08,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 332 transitions. [2022-12-13 14:24:08,178 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 332 transitions. Word has length 16 [2022-12-13 14:24:08,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:24:08,179 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 332 transitions. [2022-12-13 14:24:08,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:08,179 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 332 transitions. [2022-12-13 14:24:08,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-13 14:24:08,179 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:24:08,180 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:24:08,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 14:24:08,180 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting dll_insert_masterErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [dll_insert_masterErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 95 more)] === [2022-12-13 14:24:08,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:24:08,180 INFO L85 PathProgramCache]: Analyzing trace with hash -226556129, now seen corresponding path program 1 times [2022-12-13 14:24:08,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:24:08,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205370959] [2022-12-13 14:24:08,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:24:08,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:24:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:08,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:24:08,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:24:08,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205370959] [2022-12-13 14:24:08,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205370959] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:24:08,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:24:08,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 14:24:08,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451573838] [2022-12-13 14:24:08,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:24:08,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:24:08,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:24:08,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:24:08,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:24:08,379 INFO L87 Difference]: Start difference. First operand 289 states and 332 transitions. Second operand has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:08,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:24:08,814 INFO L93 Difference]: Finished difference Result 299 states and 342 transitions. [2022-12-13 14:24:08,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 14:24:08,814 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-13 14:24:08,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:24:08,816 INFO L225 Difference]: With dead ends: 299 [2022-12-13 14:24:08,816 INFO L226 Difference]: Without dead ends: 299 [2022-12-13 14:24:08,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-13 14:24:08,817 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 80 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 14:24:08,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 1016 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 14:24:08,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-12-13 14:24:08,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 289. [2022-12-13 14:24:08,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 162 states have (on average 1.7345679012345678) internal successors, (281), 268 states have internal predecessors, (281), 30 states have call successors, (30), 10 states have call predecessors, (30), 7 states have return successors, (19), 13 states have call predecessors, (19), 16 states have call successors, (19) [2022-12-13 14:24:08,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 330 transitions. [2022-12-13 14:24:08,826 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 330 transitions. Word has length 16 [2022-12-13 14:24:08,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:24:08,827 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 330 transitions. [2022-12-13 14:24:08,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:08,827 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 330 transitions. [2022-12-13 14:24:08,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-13 14:24:08,828 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:24:08,828 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:24:08,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 14:24:08,828 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting dll_insert_masterErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [dll_insert_masterErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 95 more)] === [2022-12-13 14:24:08,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:24:08,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1322891007, now seen corresponding path program 1 times [2022-12-13 14:24:08,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:24:08,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315678747] [2022-12-13 14:24:08,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:24:08,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:24:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:24:08,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:24:08,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315678747] [2022-12-13 14:24:08,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315678747] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:24:08,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:24:08,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 14:24:08,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512940964] [2022-12-13 14:24:08,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:24:08,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:24:08,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:24:08,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:24:08,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:24:08,886 INFO L87 Difference]: Start difference. First operand 289 states and 330 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:09,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:24:09,062 INFO L93 Difference]: Finished difference Result 288 states and 329 transitions. [2022-12-13 14:24:09,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:24:09,062 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-13 14:24:09,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:24:09,064 INFO L225 Difference]: With dead ends: 288 [2022-12-13 14:24:09,065 INFO L226 Difference]: Without dead ends: 288 [2022-12-13 14:24:09,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:24:09,065 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 40 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 14:24:09,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 813 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 14:24:09,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-12-13 14:24:09,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2022-12-13 14:24:09,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 162 states have (on average 1.728395061728395) internal successors, (280), 267 states have internal predecessors, (280), 30 states have call successors, (30), 10 states have call predecessors, (30), 7 states have return successors, (19), 13 states have call predecessors, (19), 16 states have call successors, (19) [2022-12-13 14:24:09,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 329 transitions. [2022-12-13 14:24:09,074 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 329 transitions. Word has length 18 [2022-12-13 14:24:09,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:24:09,074 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 329 transitions. [2022-12-13 14:24:09,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:09,074 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 329 transitions. [2022-12-13 14:24:09,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-13 14:24:09,074 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:24:09,075 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:24:09,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 14:24:09,075 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting dll_insert_masterErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [dll_insert_masterErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 95 more)] === [2022-12-13 14:24:09,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:24:09,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1322891008, now seen corresponding path program 1 times [2022-12-13 14:24:09,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:24:09,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944471968] [2022-12-13 14:24:09,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:24:09,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:24:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:24:09,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:24:09,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944471968] [2022-12-13 14:24:09,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944471968] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:24:09,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:24:09,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 14:24:09,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130646033] [2022-12-13 14:24:09,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:24:09,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 14:24:09,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:24:09,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 14:24:09,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 14:24:09,159 INFO L87 Difference]: Start difference. First operand 288 states and 329 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:09,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:24:09,323 INFO L93 Difference]: Finished difference Result 287 states and 328 transitions. [2022-12-13 14:24:09,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:24:09,323 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-13 14:24:09,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:24:09,326 INFO L225 Difference]: With dead ends: 287 [2022-12-13 14:24:09,326 INFO L226 Difference]: Without dead ends: 287 [2022-12-13 14:24:09,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 14:24:09,327 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 54 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:24:09,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 914 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:24:09,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-12-13 14:24:09,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2022-12-13 14:24:09,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 162 states have (on average 1.7222222222222223) internal successors, (279), 266 states have internal predecessors, (279), 30 states have call successors, (30), 10 states have call predecessors, (30), 7 states have return successors, (19), 13 states have call predecessors, (19), 16 states have call successors, (19) [2022-12-13 14:24:09,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 328 transitions. [2022-12-13 14:24:09,332 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 328 transitions. Word has length 18 [2022-12-13 14:24:09,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:24:09,333 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 328 transitions. [2022-12-13 14:24:09,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:09,333 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 328 transitions. [2022-12-13 14:24:09,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-13 14:24:09,333 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:24:09,333 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] [2022-12-13 14:24:09,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 14:24:09,333 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting dll_insert_masterErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [dll_insert_masterErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 95 more)] === [2022-12-13 14:24:09,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:24:09,334 INFO L85 PathProgramCache]: Analyzing trace with hash -12061856, now seen corresponding path program 1 times [2022-12-13 14:24:09,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:24:09,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368596403] [2022-12-13 14:24:09,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:24:09,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:24:09,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:09,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:24:09,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:24:09,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368596403] [2022-12-13 14:24:09,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368596403] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:24:09,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:24:09,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 14:24:09,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57543440] [2022-12-13 14:24:09,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:24:09,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 14:24:09,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:24:09,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 14:24:09,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-12-13 14:24:09,595 INFO L87 Difference]: Start difference. First operand 287 states and 328 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:09,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:24:09,949 INFO L93 Difference]: Finished difference Result 326 states and 372 transitions. [2022-12-13 14:24:09,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 14:24:09,949 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-12-13 14:24:09,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:24:09,951 INFO L225 Difference]: With dead ends: 326 [2022-12-13 14:24:09,951 INFO L226 Difference]: Without dead ends: 326 [2022-12-13 14:24:09,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-12-13 14:24:09,952 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 47 mSDsluCounter, 1508 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1780 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 14:24:09,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1780 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 14:24:09,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-12-13 14:24:09,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 307. [2022-12-13 14:24:09,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 179 states have (on average 1.681564245810056) internal successors, (301), 283 states have internal predecessors, (301), 32 states have call successors, (32), 12 states have call predecessors, (32), 8 states have return successors, (23), 14 states have call predecessors, (23), 18 states have call successors, (23) [2022-12-13 14:24:09,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 356 transitions. [2022-12-13 14:24:09,961 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 356 transitions. Word has length 20 [2022-12-13 14:24:09,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:24:09,961 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 356 transitions. [2022-12-13 14:24:09,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:09,962 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 356 transitions. [2022-12-13 14:24:09,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 14:24:09,962 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:24:09,962 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:24:09,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 14:24:09,963 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ##fun~$Pointer$~TO~VOIDErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [dll_insert_masterErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 95 more)] === [2022-12-13 14:24:09,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:24:09,963 INFO L85 PathProgramCache]: Analyzing trace with hash 551710607, now seen corresponding path program 1 times [2022-12-13 14:24:09,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:24:09,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798210152] [2022-12-13 14:24:09,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:24:09,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:24:09,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:10,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 14:24:10,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:24:10,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798210152] [2022-12-13 14:24:10,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798210152] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:24:10,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:24:10,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:24:10,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387067825] [2022-12-13 14:24:10,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:24:10,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:24:10,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:24:10,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:24:10,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:24:10,048 INFO L87 Difference]: Start difference. First operand 307 states and 356 transitions. Second operand has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:10,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:24:10,145 INFO L93 Difference]: Finished difference Result 305 states and 354 transitions. [2022-12-13 14:24:10,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:24:10,145 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-12-13 14:24:10,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:24:10,146 INFO L225 Difference]: With dead ends: 305 [2022-12-13 14:24:10,147 INFO L226 Difference]: Without dead ends: 305 [2022-12-13 14:24:10,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:24:10,147 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 21 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:24:10,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 458 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:24:10,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-12-13 14:24:10,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2022-12-13 14:24:10,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 179 states have (on average 1.670391061452514) internal successors, (299), 281 states have internal predecessors, (299), 32 states have call successors, (32), 12 states have call predecessors, (32), 8 states have return successors, (23), 14 states have call predecessors, (23), 18 states have call successors, (23) [2022-12-13 14:24:10,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 354 transitions. [2022-12-13 14:24:10,156 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 354 transitions. Word has length 27 [2022-12-13 14:24:10,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:24:10,156 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 354 transitions. [2022-12-13 14:24:10,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:10,157 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 354 transitions. [2022-12-13 14:24:10,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-13 14:24:10,157 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:24:10,157 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 14:24:10,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 14:24:10,158 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ##fun~$Pointer$~TO~VOIDErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [dll_insert_masterErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 95 more)] === [2022-12-13 14:24:10,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:24:10,158 INFO L85 PathProgramCache]: Analyzing trace with hash 67060467, now seen corresponding path program 1 times [2022-12-13 14:24:10,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:24:10,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935565711] [2022-12-13 14:24:10,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:24:10,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:24:10,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:10,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:24:10,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:24:10,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935565711] [2022-12-13 14:24:10,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935565711] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:24:10,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:24:10,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 14:24:10,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940975336] [2022-12-13 14:24:10,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:24:10,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 14:24:10,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:24:10,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 14:24:10,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 14:24:10,402 INFO L87 Difference]: Start difference. First operand 305 states and 354 transitions. Second operand has 6 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:10,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:24:10,721 INFO L93 Difference]: Finished difference Result 304 states and 353 transitions. [2022-12-13 14:24:10,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:24:10,721 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-12-13 14:24:10,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:24:10,723 INFO L225 Difference]: With dead ends: 304 [2022-12-13 14:24:10,723 INFO L226 Difference]: Without dead ends: 304 [2022-12-13 14:24:10,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-13 14:24:10,724 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 62 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 14:24:10,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 873 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 14:24:10,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-12-13 14:24:10,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 303. [2022-12-13 14:24:10,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 179 states have (on average 1.6592178770949721) internal successors, (297), 279 states have internal predecessors, (297), 32 states have call successors, (32), 12 states have call predecessors, (32), 8 states have return successors, (23), 14 states have call predecessors, (23), 18 states have call successors, (23) [2022-12-13 14:24:10,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 352 transitions. [2022-12-13 14:24:10,729 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 352 transitions. Word has length 31 [2022-12-13 14:24:10,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:24:10,729 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 352 transitions. [2022-12-13 14:24:10,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:10,730 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 352 transitions. [2022-12-13 14:24:10,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-13 14:24:10,730 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:24:10,730 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 14:24:10,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 14:24:10,730 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ##fun~$Pointer$~TO~VOIDErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [dll_insert_masterErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 95 more)] === [2022-12-13 14:24:10,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:24:10,730 INFO L85 PathProgramCache]: Analyzing trace with hash 67060466, now seen corresponding path program 1 times [2022-12-13 14:24:10,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:24:10,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503125669] [2022-12-13 14:24:10,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:24:10,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:24:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:10,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:24:10,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:24:10,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503125669] [2022-12-13 14:24:10,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503125669] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:24:10,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:24:10,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 14:24:10,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713396913] [2022-12-13 14:24:10,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:24:10,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:24:10,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:24:10,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:24:10,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:24:10,864 INFO L87 Difference]: Start difference. First operand 303 states and 352 transitions. Second operand has 7 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:11,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:24:11,063 INFO L93 Difference]: Finished difference Result 301 states and 350 transitions. [2022-12-13 14:24:11,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:24:11,064 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-12-13 14:24:11,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:24:11,064 INFO L225 Difference]: With dead ends: 301 [2022-12-13 14:24:11,064 INFO L226 Difference]: Without dead ends: 301 [2022-12-13 14:24:11,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-12-13 14:24:11,065 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 70 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 14:24:11,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 975 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 14:24:11,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-12-13 14:24:11,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2022-12-13 14:24:11,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 179 states have (on average 1.6480446927374302) internal successors, (295), 277 states have internal predecessors, (295), 32 states have call successors, (32), 12 states have call predecessors, (32), 8 states have return successors, (23), 14 states have call predecessors, (23), 18 states have call successors, (23) [2022-12-13 14:24:11,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 350 transitions. [2022-12-13 14:24:11,070 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 350 transitions. Word has length 31 [2022-12-13 14:24:11,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:24:11,070 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 350 transitions. [2022-12-13 14:24:11,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:11,070 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 350 transitions. [2022-12-13 14:24:11,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-13 14:24:11,071 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:24:11,071 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 14:24:11,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 14:24:11,071 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ##fun~$Pointer$~TO~VOIDErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [dll_insert_masterErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 95 more)] === [2022-12-13 14:24:11,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:24:11,071 INFO L85 PathProgramCache]: Analyzing trace with hash 20600531, now seen corresponding path program 1 times [2022-12-13 14:24:11,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:24:11,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649722069] [2022-12-13 14:24:11,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:24:11,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:24:11,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:11,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 14:24:11,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:24:11,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649722069] [2022-12-13 14:24:11,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649722069] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:24:11,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:24:11,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 14:24:11,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897083661] [2022-12-13 14:24:11,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:24:11,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:24:11,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:24:11,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:24:11,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:24:11,128 INFO L87 Difference]: Start difference. First operand 301 states and 350 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:11,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:24:11,283 INFO L93 Difference]: Finished difference Result 300 states and 349 transitions. [2022-12-13 14:24:11,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:24:11,283 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-12-13 14:24:11,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:24:11,284 INFO L225 Difference]: With dead ends: 300 [2022-12-13 14:24:11,284 INFO L226 Difference]: Without dead ends: 300 [2022-12-13 14:24:11,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:24:11,285 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 38 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:24:11,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 801 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:24:11,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-12-13 14:24:11,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2022-12-13 14:24:11,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 179 states have (on average 1.6424581005586592) internal successors, (294), 276 states have internal predecessors, (294), 32 states have call successors, (32), 12 states have call predecessors, (32), 8 states have return successors, (23), 14 states have call predecessors, (23), 18 states have call successors, (23) [2022-12-13 14:24:11,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 349 transitions. [2022-12-13 14:24:11,290 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 349 transitions. Word has length 33 [2022-12-13 14:24:11,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:24:11,290 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 349 transitions. [2022-12-13 14:24:11,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:11,290 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 349 transitions. [2022-12-13 14:24:11,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-13 14:24:11,291 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:24:11,291 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 14:24:11,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 14:24:11,291 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ##fun~$Pointer$~TO~VOIDErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [dll_insert_masterErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 95 more)] === [2022-12-13 14:24:11,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:24:11,291 INFO L85 PathProgramCache]: Analyzing trace with hash 20600532, now seen corresponding path program 1 times [2022-12-13 14:24:11,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:24:11,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185568544] [2022-12-13 14:24:11,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:24:11,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:24:11,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:11,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 14:24:11,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:24:11,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185568544] [2022-12-13 14:24:11,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185568544] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:24:11,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:24:11,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 14:24:11,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239148304] [2022-12-13 14:24:11,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:24:11,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 14:24:11,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:24:11,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 14:24:11,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 14:24:11,393 INFO L87 Difference]: Start difference. First operand 300 states and 349 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:11,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:24:11,559 INFO L93 Difference]: Finished difference Result 299 states and 348 transitions. [2022-12-13 14:24:11,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:24:11,560 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-12-13 14:24:11,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:24:11,562 INFO L225 Difference]: With dead ends: 299 [2022-12-13 14:24:11,562 INFO L226 Difference]: Without dead ends: 299 [2022-12-13 14:24:11,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 14:24:11,562 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 35 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:24:11,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1086 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:24:11,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-12-13 14:24:11,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2022-12-13 14:24:11,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 179 states have (on average 1.6368715083798884) internal successors, (293), 275 states have internal predecessors, (293), 32 states have call successors, (32), 12 states have call predecessors, (32), 8 states have return successors, (23), 14 states have call predecessors, (23), 18 states have call successors, (23) [2022-12-13 14:24:11,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 348 transitions. [2022-12-13 14:24:11,568 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 348 transitions. Word has length 33 [2022-12-13 14:24:11,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:24:11,568 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 348 transitions. [2022-12-13 14:24:11,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:11,568 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 348 transitions. [2022-12-13 14:24:11,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-13 14:24:11,568 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:24:11,568 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2022-12-13 14:24:11,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 14:24:11,569 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ##fun~$Pointer$~TO~VOIDErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [dll_insert_masterErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 95 more)] === [2022-12-13 14:24:11,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:24:11,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1677723852, now seen corresponding path program 1 times [2022-12-13 14:24:11,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:24:11,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894233615] [2022-12-13 14:24:11,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:24:11,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:24:11,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:11,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:24:11,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:24:11,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894233615] [2022-12-13 14:24:11,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894233615] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:24:11,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:24:11,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 14:24:11,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548547012] [2022-12-13 14:24:11,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:24:11,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 14:24:11,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:24:11,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 14:24:11,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-13 14:24:11,813 INFO L87 Difference]: Start difference. First operand 299 states and 348 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:12,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:24:12,094 INFO L93 Difference]: Finished difference Result 313 states and 363 transitions. [2022-12-13 14:24:12,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 14:24:12,095 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-12-13 14:24:12,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:24:12,096 INFO L225 Difference]: With dead ends: 313 [2022-12-13 14:24:12,096 INFO L226 Difference]: Without dead ends: 313 [2022-12-13 14:24:12,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-12-13 14:24:12,097 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 28 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1587 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 14:24:12,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 1587 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 14:24:12,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-12-13 14:24:12,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 312. [2022-12-13 14:24:12,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 191 states have (on average 1.5968586387434556) internal successors, (305), 288 states have internal predecessors, (305), 32 states have call successors, (32), 12 states have call predecessors, (32), 9 states have return successors, (25), 14 states have call predecessors, (25), 18 states have call successors, (25) [2022-12-13 14:24:12,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 362 transitions. [2022-12-13 14:24:12,105 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 362 transitions. Word has length 35 [2022-12-13 14:24:12,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:24:12,105 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 362 transitions. [2022-12-13 14:24:12,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:12,105 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 362 transitions. [2022-12-13 14:24:12,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 14:24:12,106 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:24:12,106 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:24:12,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 14:24:12,106 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ##fun~$Pointer$~TO~VOIDErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [dll_insert_masterErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 95 more)] === [2022-12-13 14:24:12,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:24:12,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1451018694, now seen corresponding path program 1 times [2022-12-13 14:24:12,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:24:12,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468735254] [2022-12-13 14:24:12,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:24:12,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:24:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:12,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 14:24:12,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:12,698 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:24:12,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:24:12,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468735254] [2022-12-13 14:24:12,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468735254] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:24:12,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15973930] [2022-12-13 14:24:12,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:24:12,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:24:12,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:24:12,699 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:24:12,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 14:24:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:12,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 67 conjunts are in the unsatisfiable core [2022-12-13 14:24:12,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:24:12,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 14:24:13,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 14:24:13,139 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-12-13 14:24:13,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 41 [2022-12-13 14:24:13,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-13 14:24:13,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-13 14:24:13,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-13 14:24:13,431 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:24:13,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:24:13,850 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 14:24:13,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2022-12-13 14:24:13,879 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:24:13,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-13 14:24:13,888 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:24:13,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2022-12-13 14:24:13,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-13 14:24:18,937 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:24:18,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 131 treesize of output 285 [2022-12-13 14:24:21,529 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 14:24:21,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15973930] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:24:21,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:24:21,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 41 [2022-12-13 14:24:21,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279976806] [2022-12-13 14:24:21,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:24:21,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-13 14:24:21,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:24:21,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-13 14:24:21,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1580, Unknown=2, NotChecked=0, Total=1722 [2022-12-13 14:24:21,531 INFO L87 Difference]: Start difference. First operand 312 states and 362 transitions. Second operand has 42 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 37 states have internal predecessors, (82), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 14:24:24,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:24:24,417 INFO L93 Difference]: Finished difference Result 316 states and 365 transitions. [2022-12-13 14:24:24,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 14:24:24,418 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 37 states have internal predecessors, (82), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-12-13 14:24:24,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:24:24,420 INFO L225 Difference]: With dead ends: 316 [2022-12-13 14:24:24,420 INFO L226 Difference]: Without dead ends: 316 [2022-12-13 14:24:24,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=434, Invalid=2644, Unknown=2, NotChecked=0, Total=3080 [2022-12-13 14:24:24,421 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 244 mSDsluCounter, 3648 mSDsCounter, 0 mSdLazyCounter, 4021 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 3853 SdHoareTripleChecker+Invalid, 4086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 4021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-13 14:24:24,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 3853 Invalid, 4086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 4021 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-13 14:24:24,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-12-13 14:24:24,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 311. [2022-12-13 14:24:24,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 191 states have (on average 1.5916230366492146) internal successors, (304), 287 states have internal predecessors, (304), 32 states have call successors, (32), 12 states have call predecessors, (32), 9 states have return successors, (23), 14 states have call predecessors, (23), 18 states have call successors, (23) [2022-12-13 14:24:24,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 359 transitions. [2022-12-13 14:24:24,430 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 359 transitions. Word has length 51 [2022-12-13 14:24:24,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:24:24,430 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 359 transitions. [2022-12-13 14:24:24,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 37 states have internal predecessors, (82), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 14:24:24,430 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 359 transitions. [2022-12-13 14:24:24,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 14:24:24,430 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:24:24,431 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:24:24,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 14:24:24,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 14:24:24,631 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ##fun~$Pointer$~TO~VOIDErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [dll_insert_masterErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 95 more)] === [2022-12-13 14:24:24,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:24:24,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1451018695, now seen corresponding path program 1 times [2022-12-13 14:24:24,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:24:24,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606882045] [2022-12-13 14:24:24,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:24:24,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:24:24,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:25,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 14:24:25,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:25,376 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:24:25,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:24:25,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606882045] [2022-12-13 14:24:25,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606882045] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:24:25,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637173883] [2022-12-13 14:24:25,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:24:25,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:24:25,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:24:25,377 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:24:25,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 14:24:25,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:25,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 89 conjunts are in the unsatisfiable core [2022-12-13 14:24:25,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:24:25,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 14:24:25,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 14:24:25,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 14:24:25,692 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-12-13 14:24:25,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 14:24:25,701 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 14:24:25,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 14:24:25,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 14:24:25,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 14:24:25,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 14:24:25,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 14:24:25,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-13 14:24:25,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 14:24:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:24:25,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:24:25,953 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_768 (Array Int Int)) (v_ArrVal_769 (Array Int Int))) (<= (+ 8 (select (select (store |c_#memory_$Pointer$.offset| |c_##fun~$Pointer$~TO~VOID_alloc_or_die_slave_~ptr~0#1.base| v_ArrVal_768) |c_##fun~$Pointer$~TO~VOID_dll_insert_slave_~dll#1.base|) |c_##fun~$Pointer$~TO~VOID_dll_insert_slave_~dll#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_##fun~$Pointer$~TO~VOID_alloc_or_die_slave_~ptr~0#1.base| v_ArrVal_769) |c_##fun~$Pointer$~TO~VOID_dll_insert_slave_~dll#1.base|) |c_##fun~$Pointer$~TO~VOID_dll_insert_slave_~dll#1.offset|)))) (forall ((v_ArrVal_768 (Array Int Int))) (<= 0 (+ 4 (select (select (store |c_#memory_$Pointer$.offset| |c_##fun~$Pointer$~TO~VOID_alloc_or_die_slave_~ptr~0#1.base| v_ArrVal_768) |c_##fun~$Pointer$~TO~VOID_dll_insert_slave_~dll#1.base|) |c_##fun~$Pointer$~TO~VOID_dll_insert_slave_~dll#1.offset|))))) is different from false [2022-12-13 14:24:28,177 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 14:24:28,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 1 [2022-12-13 14:24:28,209 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:24:28,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-12-13 14:24:28,215 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:24:28,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2022-12-13 14:24:28,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-12-13 14:24:28,238 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:24:28,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 41 [2022-12-13 14:24:28,243 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:24:28,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2022-12-13 14:24:28,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:24:28,250 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:24:28,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2022-12-13 14:24:28,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:24:28,259 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:24:28,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-12-13 14:24:28,442 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:24:28,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 171 [2022-12-13 14:24:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2022-12-13 14:24:29,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637173883] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:24:29,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:24:29,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 13] total 32 [2022-12-13 14:24:29,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675774827] [2022-12-13 14:24:29,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:24:29,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 14:24:29,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:24:29,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 14:24:29,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=900, Unknown=3, NotChecked=60, Total=1056 [2022-12-13 14:24:29,489 INFO L87 Difference]: Start difference. First operand 311 states and 359 transitions. Second operand has 33 states, 28 states have (on average 2.75) internal successors, (77), 28 states have internal predecessors, (77), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 14:24:31,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:24:31,921 INFO L93 Difference]: Finished difference Result 311 states and 359 transitions. [2022-12-13 14:24:31,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 14:24:31,922 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 28 states have (on average 2.75) internal successors, (77), 28 states have internal predecessors, (77), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-12-13 14:24:31,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:24:31,923 INFO L225 Difference]: With dead ends: 311 [2022-12-13 14:24:31,923 INFO L226 Difference]: Without dead ends: 311 [2022-12-13 14:24:31,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=307, Invalid=1764, Unknown=3, NotChecked=88, Total=2162 [2022-12-13 14:24:31,924 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 203 mSDsluCounter, 2831 mSDsCounter, 0 mSdLazyCounter, 3267 mSolverCounterSat, 63 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 3036 SdHoareTripleChecker+Invalid, 3501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 3267 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-13 14:24:31,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 3036 Invalid, 3501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 3267 Invalid, 1 Unknown, 170 Unchecked, 1.8s Time] [2022-12-13 14:24:31,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-12-13 14:24:31,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 310. [2022-12-13 14:24:31,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 191 states have (on average 1.5863874345549738) internal successors, (303), 286 states have internal predecessors, (303), 32 states have call successors, (32), 12 states have call predecessors, (32), 9 states have return successors, (23), 14 states have call predecessors, (23), 18 states have call successors, (23) [2022-12-13 14:24:31,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 358 transitions. [2022-12-13 14:24:31,928 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 358 transitions. Word has length 51 [2022-12-13 14:24:31,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:24:31,928 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 358 transitions. [2022-12-13 14:24:31,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 28 states have (on average 2.75) internal successors, (77), 28 states have internal predecessors, (77), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 14:24:31,928 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 358 transitions. [2022-12-13 14:24:31,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-13 14:24:31,929 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:24:31,929 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:24:31,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-13 14:24:32,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 14:24:32,131 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting dll_insert_masterErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [dll_insert_masterErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 95 more)] === [2022-12-13 14:24:32,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:24:32,132 INFO L85 PathProgramCache]: Analyzing trace with hash -470108245, now seen corresponding path program 1 times [2022-12-13 14:24:32,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:24:32,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120203190] [2022-12-13 14:24:32,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:24:32,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:24:32,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:32,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 14:24:32,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:32,272 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:24:32,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:24:32,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120203190] [2022-12-13 14:24:32,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120203190] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:24:32,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877942518] [2022-12-13 14:24:32,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:24:32,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:24:32,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:24:32,273 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:24:32,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 14:24:32,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:32,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 14:24:32,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:24:32,437 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:24:32,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:24:32,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877942518] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:24:32,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:24:32,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 6 [2022-12-13 14:24:32,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573889201] [2022-12-13 14:24:32,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:24:32,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:24:32,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:24:32,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:24:32,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 14:24:32,439 INFO L87 Difference]: Start difference. First operand 310 states and 358 transitions. Second operand has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:24:32,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:24:32,477 INFO L93 Difference]: Finished difference Result 296 states and 332 transitions. [2022-12-13 14:24:32,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:24:32,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-12-13 14:24:32,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:24:32,480 INFO L225 Difference]: With dead ends: 296 [2022-12-13 14:24:32,480 INFO L226 Difference]: Without dead ends: 296 [2022-12-13 14:24:32,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:24:32,480 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 28 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:24:32,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 1078 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:24:32,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-12-13 14:24:32,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2022-12-13 14:24:32,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 180 states have (on average 1.5944444444444446) internal successors, (287), 275 states have internal predecessors, (287), 29 states have call successors, (29), 11 states have call predecessors, (29), 9 states have return successors, (16), 12 states have call predecessors, (16), 15 states have call successors, (16) [2022-12-13 14:24:32,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 332 transitions. [2022-12-13 14:24:32,484 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 332 transitions. Word has length 54 [2022-12-13 14:24:32,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:24:32,484 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 332 transitions. [2022-12-13 14:24:32,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:24:32,485 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 332 transitions. [2022-12-13 14:24:32,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-13 14:24:32,485 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:24:32,485 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:24:32,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 14:24:32,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:24:32,686 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting dll_insert_masterErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [dll_insert_masterErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 95 more)] === [2022-12-13 14:24:32,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:24:32,686 INFO L85 PathProgramCache]: Analyzing trace with hash -996489836, now seen corresponding path program 1 times [2022-12-13 14:24:32,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:24:32,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186499821] [2022-12-13 14:24:32,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:24:32,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:24:32,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:33,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 14:24:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:33,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-12-13 14:24:33,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:33,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 14:24:33,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:33,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 14:24:33,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:33,815 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:24:33,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:24:33,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186499821] [2022-12-13 14:24:33,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186499821] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:24:33,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101668608] [2022-12-13 14:24:33,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:24:33,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:24:33,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:24:33,816 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:24:33,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 14:24:33,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:33,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-13 14:24:33,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:24:34,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 14:24:34,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-12-13 14:24:34,459 WARN L859 $PredicateComparison]: unable to prove that (exists ((|##fun~$Pointer$~TO~VOID_alloc_or_die_slave_~ptr~0#1.base| Int) (v_ArrVal_1295 (Array Int Int))) (and (< |##fun~$Pointer$~TO~VOID_alloc_or_die_slave_~ptr~0#1.base| |c_#StackHeapBarrier|) (= |c_##fun~$Pointer$~TO~VOID_dll_insert_slave_~next~0#1.base| (select (select (store |c_old(#memory_$Pointer$.base)| |##fun~$Pointer$~TO~VOID_alloc_or_die_slave_~ptr~0#1.base| v_ArrVal_1295) |c_##fun~$Pointer$~TO~VOID_#in~10#1.base|) |c_##fun~$Pointer$~TO~VOID_#in~10#1.offset|)))) is different from true [2022-12-13 14:24:34,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:24:34,529 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 1 not checked. [2022-12-13 14:24:34,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:24:34,884 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1318 (Array Int Int)) (|v_##fun~$Pointer$~TO~VOID_alloc_or_die_slave_~ptr~0#1.base_40| Int)) (or (not (< |v_##fun~$Pointer$~TO~VOID_alloc_or_die_slave_~ptr~0#1.base_40| |c_#StackHeapBarrier|)) (not (= (select (select (store |c_#memory_$Pointer$.base| |v_##fun~$Pointer$~TO~VOID_alloc_or_die_slave_~ptr~0#1.base_40| v_ArrVal_1318) |c_dll_create_generic_~#dll~0.base|) |c_dll_create_generic_~#dll~0.offset|) 0)))) is different from false [2022-12-13 14:24:34,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101668608] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:24:34,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:24:34,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2022-12-13 14:24:34,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302730916] [2022-12-13 14:24:34,885 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:24:34,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 14:24:34,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:24:34,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 14:24:34,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=846, Unknown=11, NotChecked=118, Total=1056 [2022-12-13 14:24:34,886 INFO L87 Difference]: Start difference. First operand 296 states and 332 transitions. Second operand has 32 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 28 states have internal predecessors, (76), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-13 14:24:43,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:24:43,548 INFO L93 Difference]: Finished difference Result 300 states and 335 transitions. [2022-12-13 14:24:43,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 14:24:43,548 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 28 states have internal predecessors, (76), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 64 [2022-12-13 14:24:43,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:24:43,549 INFO L225 Difference]: With dead ends: 300 [2022-12-13 14:24:43,549 INFO L226 Difference]: Without dead ends: 296 [2022-12-13 14:24:43,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=260, Invalid=1979, Unknown=25, NotChecked=186, Total=2450 [2022-12-13 14:24:43,550 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 165 mSDsluCounter, 3573 mSDsCounter, 0 mSdLazyCounter, 2982 mSolverCounterSat, 29 mSolverCounterUnsat, 34 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 3769 SdHoareTripleChecker+Invalid, 3338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2982 IncrementalHoareTripleChecker+Invalid, 34 IncrementalHoareTripleChecker+Unknown, 293 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-13 14:24:43,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 3769 Invalid, 3338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2982 Invalid, 34 Unknown, 293 Unchecked, 1.7s Time] [2022-12-13 14:24:43,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-12-13 14:24:43,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2022-12-13 14:24:43,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 180 states have (on average 1.5888888888888888) internal successors, (286), 275 states have internal predecessors, (286), 29 states have call successors, (29), 11 states have call predecessors, (29), 9 states have return successors, (16), 12 states have call predecessors, (16), 15 states have call successors, (16) [2022-12-13 14:24:43,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 331 transitions. [2022-12-13 14:24:43,554 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 331 transitions. Word has length 64 [2022-12-13 14:24:43,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:24:43,554 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 331 transitions. [2022-12-13 14:24:43,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 28 states have internal predecessors, (76), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-13 14:24:43,554 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 331 transitions. [2022-12-13 14:24:43,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-13 14:24:43,554 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:24:43,554 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:24:43,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 14:24:43,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:24:43,756 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting dll_insert_masterErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [dll_insert_masterErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 95 more)] === [2022-12-13 14:24:43,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:24:43,757 INFO L85 PathProgramCache]: Analyzing trace with hash 2033150353, now seen corresponding path program 1 times [2022-12-13 14:24:43,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:24:43,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245871994] [2022-12-13 14:24:43,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:24:43,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:24:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:44,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 14:24:44,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:44,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-12-13 14:24:44,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:47,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 14:24:47,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:47,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 14:24:47,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:49,413 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:24:49,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:24:49,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245871994] [2022-12-13 14:24:49,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245871994] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:24:49,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423544733] [2022-12-13 14:24:49,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:24:49,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:24:49,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:24:49,415 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:24:49,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 14:24:49,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:49,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 79 conjunts are in the unsatisfiable core [2022-12-13 14:24:49,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:24:49,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 14:24:49,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 14:24:50,091 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 14:24:50,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2022-12-13 14:24:50,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-12-13 14:24:50,549 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1681 Int)) (= |c_#valid| (store |c_old(#valid)| |c_##fun~$Pointer$~TO~VOID_dll_insert_slave_~item~0#1.base| v_ArrVal_1681))) (< |c_##fun~$Pointer$~TO~VOID_dll_insert_slave_~item~0#1.base| |c_#StackHeapBarrier|)) is different from true [2022-12-13 14:24:50,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-12-13 14:24:51,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:24:51,046 INFO L321 Elim1Store]: treesize reduction 91, result has 20.2 percent of original size [2022-12-13 14:24:51,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 46 [2022-12-13 14:24:51,056 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-13 14:24:51,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:24:51,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423544733] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:24:51,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:24:51,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 21] total 45 [2022-12-13 14:24:51,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79423027] [2022-12-13 14:24:51,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:24:51,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-13 14:24:51,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:24:51,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-13 14:24:51,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1892, Unknown=19, NotChecked=88, Total=2162 [2022-12-13 14:24:51,374 INFO L87 Difference]: Start difference. First operand 296 states and 331 transitions. Second operand has 46 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 41 states have internal predecessors, (99), 8 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-13 14:24:57,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:24:57,864 INFO L93 Difference]: Finished difference Result 328 states and 374 transitions. [2022-12-13 14:24:57,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 14:24:57,865 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 41 states have internal predecessors, (99), 8 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 65 [2022-12-13 14:24:57,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:24:57,866 INFO L225 Difference]: With dead ends: 328 [2022-12-13 14:24:57,866 INFO L226 Difference]: Without dead ends: 328 [2022-12-13 14:24:57,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=425, Invalid=3836, Unknown=33, NotChecked=128, Total=4422 [2022-12-13 14:24:57,867 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 311 mSDsluCounter, 3055 mSDsCounter, 0 mSdLazyCounter, 4726 mSolverCounterSat, 63 mSolverCounterUnsat, 84 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 3241 SdHoareTripleChecker+Invalid, 5166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 4726 IncrementalHoareTripleChecker+Invalid, 84 IncrementalHoareTripleChecker+Unknown, 293 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-12-13 14:24:57,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 3241 Invalid, 5166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 4726 Invalid, 84 Unknown, 293 Unchecked, 4.3s Time] [2022-12-13 14:24:57,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-12-13 14:24:57,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 307. [2022-12-13 14:24:57,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 189 states have (on average 1.5767195767195767) internal successors, (298), 282 states have internal predecessors, (298), 29 states have call successors, (29), 11 states have call predecessors, (29), 11 states have return successors, (19), 16 states have call predecessors, (19), 15 states have call successors, (19) [2022-12-13 14:24:57,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 346 transitions. [2022-12-13 14:24:57,872 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 346 transitions. Word has length 65 [2022-12-13 14:24:57,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:24:57,872 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 346 transitions. [2022-12-13 14:24:57,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 41 states have internal predecessors, (99), 8 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-13 14:24:57,872 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 346 transitions. [2022-12-13 14:24:57,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-13 14:24:57,872 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:24:57,872 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:24:57,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 14:24:58,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:24:58,074 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting dll_insert_masterErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [dll_insert_masterErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 95 more)] === [2022-12-13 14:24:58,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:24:58,074 INFO L85 PathProgramCache]: Analyzing trace with hash 2033150354, now seen corresponding path program 1 times [2022-12-13 14:24:58,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:24:58,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432244241] [2022-12-13 14:24:58,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:24:58,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:24:58,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:58,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 14:24:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:58,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-12-13 14:24:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:25:21,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 14:25:21,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:25:22,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 14:25:22,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:25:23,505 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:25:23,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:25:23,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432244241] [2022-12-13 14:25:23,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432244241] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:25:23,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627193820] [2022-12-13 14:25:23,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:25:23,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:25:23,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:25:23,506 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:25:23,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 14:25:23,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:25:23,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 97 conjunts are in the unsatisfiable core [2022-12-13 14:25:23,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:25:23,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 14:25:23,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 14:25:23,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 14:25:24,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 14:25:24,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-12-13 14:25:24,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-12-13 14:25:27,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2022-12-13 14:25:27,312 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2074 Int) (v_ArrVal_2073 Int) (v_arrayElimCell_52 Int) (|dll_create_generic_~#dll~0.base| Int) (v_ArrVal_2077 Int) (|##fun~$Pointer$~TO~VOID_dll_insert_slave_~item~0#1.base| Int) (v_ArrVal_2071 Int)) (let ((.cse0 (store |c_old(#valid)| |dll_create_generic_~#dll~0.base| 1))) (and (< |##fun~$Pointer$~TO~VOID_dll_insert_slave_~item~0#1.base| |c_#StackHeapBarrier|) (< |c_#StackHeapBarrier| |dll_create_generic_~#dll~0.base|) (= (select (store .cse0 v_arrayElimCell_52 v_ArrVal_2073) |##fun~$Pointer$~TO~VOID_dll_insert_slave_~item~0#1.base|) 0) (= (select .cse0 v_arrayElimCell_52) 0) (= (store (store (store |c_old(#length)| |dll_create_generic_~#dll~0.base| v_ArrVal_2071) v_arrayElimCell_52 v_ArrVal_2074) |##fun~$Pointer$~TO~VOID_dll_insert_slave_~item~0#1.base| v_ArrVal_2077) |c_#length|)))) is different from true [2022-12-13 14:25:27,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:25:27,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:25:27,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:25:27,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:25:27,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:25:27,466 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 14:25:27,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-12-13 14:25:27,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:25:27,492 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-12-13 14:25:27,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2022-12-13 14:25:27,507 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 8 refuted. 5 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:25:27,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:25:34,299 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:25:34,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627193820] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:25:34,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:25:34,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23] total 46 [2022-12-13 14:25:34,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168006956] [2022-12-13 14:25:34,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:25:34,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-13 14:25:34,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:25:34,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-13 14:25:34,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2084, Unknown=15, NotChecked=92, Total=2352 [2022-12-13 14:25:34,302 INFO L87 Difference]: Start difference. First operand 307 states and 346 transitions. Second operand has 47 states, 42 states have (on average 2.4285714285714284) internal successors, (102), 41 states have internal predecessors, (102), 9 states have call successors, (11), 4 states have call predecessors, (11), 6 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 14:25:37,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 14:26:28,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:26:28,233 INFO L93 Difference]: Finished difference Result 318 states and 359 transitions. [2022-12-13 14:26:28,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 14:26:28,234 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 42 states have (on average 2.4285714285714284) internal successors, (102), 41 states have internal predecessors, (102), 9 states have call successors, (11), 4 states have call predecessors, (11), 6 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) Word has length 65 [2022-12-13 14:26:28,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:26:28,235 INFO L225 Difference]: With dead ends: 318 [2022-12-13 14:26:28,235 INFO L226 Difference]: Without dead ends: 318 [2022-12-13 14:26:28,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 58.2s TimeCoverageRelationStatistics Valid=404, Invalid=4096, Unknown=60, NotChecked=132, Total=4692 [2022-12-13 14:26:28,237 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 413 mSDsluCounter, 2215 mSDsCounter, 0 mSdLazyCounter, 4737 mSolverCounterSat, 96 mSolverCounterUnsat, 22 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 2399 SdHoareTripleChecker+Invalid, 5149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 4737 IncrementalHoareTripleChecker+Invalid, 22 IncrementalHoareTripleChecker+Unknown, 294 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-12-13 14:26:28,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 2399 Invalid, 5149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 4737 Invalid, 22 Unknown, 294 Unchecked, 6.4s Time] [2022-12-13 14:26:28,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-12-13 14:26:28,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 307. [2022-12-13 14:26:28,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 189 states have (on average 1.566137566137566) internal successors, (296), 282 states have internal predecessors, (296), 29 states have call successors, (29), 11 states have call predecessors, (29), 11 states have return successors, (19), 16 states have call predecessors, (19), 15 states have call successors, (19) [2022-12-13 14:26:28,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 344 transitions. [2022-12-13 14:26:28,243 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 344 transitions. Word has length 65 [2022-12-13 14:26:28,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:26:28,244 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 344 transitions. [2022-12-13 14:26:28,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 42 states have (on average 2.4285714285714284) internal successors, (102), 41 states have internal predecessors, (102), 9 states have call successors, (11), 4 states have call predecessors, (11), 6 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 14:26:28,244 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 344 transitions. [2022-12-13 14:26:28,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-13 14:26:28,245 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:26:28,245 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:26:28,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 14:26:28,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-13 14:26:28,447 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting dll_insert_masterErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [dll_insert_masterErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 95 more)] === [2022-12-13 14:26:28,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:26:28,448 INFO L85 PathProgramCache]: Analyzing trace with hash -352630062, now seen corresponding path program 1 times [2022-12-13 14:26:28,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:26:28,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083698328] [2022-12-13 14:26:28,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:26:28,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:26:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:26:28,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 14:26:28,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:26:28,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-12-13 14:26:28,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:26:54,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 14:26:54,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:26:55,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 14:26:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:26:57,558 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:26:57,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:26:57,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083698328] [2022-12-13 14:26:57,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083698328] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:26:57,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651601491] [2022-12-13 14:26:57,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:26:57,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:26:57,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:26:57,559 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:26:57,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 14:26:57,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:26:57,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 89 conjunts are in the unsatisfiable core [2022-12-13 14:26:57,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:26:57,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 14:26:58,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 14:26:58,251 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 14:26:58,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2022-12-13 14:26:58,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-12-13 14:27:05,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2022-12-13 14:27:05,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:27:05,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:27:05,558 INFO L321 Elim1Store]: treesize reduction 107, result has 17.7 percent of original size [2022-12-13 14:27:05,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 44 treesize of output 53 [2022-12-13 14:27:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:27:05,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:27:06,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651601491] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:27:06,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:27:06,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 21] total 48 [2022-12-13 14:27:06,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058184185] [2022-12-13 14:27:06,071 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:27:06,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-13 14:27:06,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:27:06,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-13 14:27:06,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2263, Unknown=12, NotChecked=0, Total=2450 [2022-12-13 14:27:06,073 INFO L87 Difference]: Start difference. First operand 307 states and 344 transitions. Second operand has 49 states, 43 states have (on average 2.558139534883721) internal successors, (110), 42 states have internal predecessors, (110), 11 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 14:27:14,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:27:14,926 INFO L93 Difference]: Finished difference Result 324 states and 368 transitions. [2022-12-13 14:27:14,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 14:27:14,926 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 43 states have (on average 2.558139534883721) internal successors, (110), 42 states have internal predecessors, (110), 11 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 67 [2022-12-13 14:27:14,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:27:14,928 INFO L225 Difference]: With dead ends: 324 [2022-12-13 14:27:14,928 INFO L226 Difference]: Without dead ends: 324 [2022-12-13 14:27:14,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=490, Invalid=4892, Unknown=20, NotChecked=0, Total=5402 [2022-12-13 14:27:14,932 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 420 mSDsluCounter, 3334 mSDsCounter, 0 mSdLazyCounter, 4774 mSolverCounterSat, 97 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 3516 SdHoareTripleChecker+Invalid, 4884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 4774 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-12-13 14:27:14,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 3516 Invalid, 4884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 4774 Invalid, 13 Unknown, 0 Unchecked, 5.8s Time] [2022-12-13 14:27:14,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-12-13 14:27:14,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 311. [2022-12-13 14:27:14,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 193 states have (on average 1.5647668393782384) internal successors, (302), 286 states have internal predecessors, (302), 29 states have call successors, (29), 11 states have call predecessors, (29), 11 states have return successors, (19), 16 states have call predecessors, (19), 15 states have call successors, (19) [2022-12-13 14:27:14,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 350 transitions. [2022-12-13 14:27:14,939 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 350 transitions. Word has length 67 [2022-12-13 14:27:14,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:27:14,940 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 350 transitions. [2022-12-13 14:27:14,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 43 states have (on average 2.558139534883721) internal successors, (110), 42 states have internal predecessors, (110), 11 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 14:27:14,940 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 350 transitions. [2022-12-13 14:27:14,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-13 14:27:14,941 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:27:14,941 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:27:14,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 14:27:15,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 14:27:15,143 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting dll_insert_masterErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [dll_insert_masterErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 95 more)] === [2022-12-13 14:27:15,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:27:15,144 INFO L85 PathProgramCache]: Analyzing trace with hash -352630061, now seen corresponding path program 1 times [2022-12-13 14:27:15,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:27:15,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467723185] [2022-12-13 14:27:15,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:27:15,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:27:15,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:27:15,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 14:27:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:27:16,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-12-13 14:27:16,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:27:34,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 14:27:34,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:27:35,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 14:27:35,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:27:36,178 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:27:36,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:27:36,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467723185] [2022-12-13 14:27:36,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467723185] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:27:36,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380459513] [2022-12-13 14:27:36,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:27:36,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:27:36,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:27:36,180 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:27:36,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 14:27:36,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:27:36,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 14:27:36,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:27:36,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 14:27:36,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 14:27:36,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 14:27:36,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 14:27:37,035 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 14:27:37,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2022-12-13 14:27:37,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-12-13 14:27:37,391 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2900 (Array Int Int)) (|##fun~$Pointer$~TO~VOID_alloc_or_die_slave_~ptr~0#1.base| Int) (v_ArrVal_2898 Int)) (and (= |c_##fun~$Pointer$~TO~VOID_dll_insert_slave_#t~mem6#1.base| (select (select (store |c_old(#memory_$Pointer$.base)| |##fun~$Pointer$~TO~VOID_alloc_or_die_slave_~ptr~0#1.base| v_ArrVal_2900) |c_##fun~$Pointer$~TO~VOID_#in~10#1.base|) |c_##fun~$Pointer$~TO~VOID_#in~10#1.offset|)) (< |##fun~$Pointer$~TO~VOID_alloc_or_die_slave_~ptr~0#1.base| |c_#StackHeapBarrier|) (= (store |c_old(#length)| |##fun~$Pointer$~TO~VOID_alloc_or_die_slave_~ptr~0#1.base| v_ArrVal_2898) |c_#length|))) is different from true [2022-12-13 14:27:37,397 WARN L859 $PredicateComparison]: unable to prove that (exists ((|##fun~$Pointer$~TO~VOID_alloc_or_die_slave_~ptr~0#1.base| Int) (v_ArrVal_2898 Int)) (and (< |##fun~$Pointer$~TO~VOID_alloc_or_die_slave_~ptr~0#1.base| |c_#StackHeapBarrier|) (= (store |c_old(#length)| |##fun~$Pointer$~TO~VOID_alloc_or_die_slave_~ptr~0#1.base| v_ArrVal_2898) |c_#length|))) is different from true [2022-12-13 14:27:37,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-12-13 14:27:39,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:27:39,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:27:39,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:27:39,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:27:39,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:27:39,621 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 14:27:39,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 30 [2022-12-13 14:27:39,636 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-12-13 14:27:39,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2022-12-13 14:27:39,676 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2022-12-13 14:27:39,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:27:45,365 WARN L233 SmtUtils]: Spent 5.29s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:27:45,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380459513] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:27:45,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:27:45,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 47 [2022-12-13 14:27:45,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582758546] [2022-12-13 14:27:45,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:27:45,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-13 14:27:45,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:27:45,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-13 14:27:45,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1968, Unknown=5, NotChecked=182, Total=2352 [2022-12-13 14:27:45,368 INFO L87 Difference]: Start difference. First operand 311 states and 350 transitions. Second operand has 48 states, 41 states have (on average 2.682926829268293) internal successors, (110), 40 states have internal predecessors, (110), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 14:27:58,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:27:58,675 INFO L93 Difference]: Finished difference Result 312 states and 350 transitions. [2022-12-13 14:27:58,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 14:27:58,676 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 41 states have (on average 2.682926829268293) internal successors, (110), 40 states have internal predecessors, (110), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 67 [2022-12-13 14:27:58,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:27:58,676 INFO L225 Difference]: With dead ends: 312 [2022-12-13 14:27:58,676 INFO L226 Difference]: Without dead ends: 312 [2022-12-13 14:27:58,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=512, Invalid=4027, Unknown=25, NotChecked=266, Total=4830 [2022-12-13 14:27:58,677 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 433 mSDsluCounter, 2285 mSDsCounter, 0 mSdLazyCounter, 3681 mSolverCounterSat, 99 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 2466 SdHoareTripleChecker+Invalid, 4357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 3681 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 567 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-12-13 14:27:58,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 2466 Invalid, 4357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 3681 Invalid, 10 Unknown, 567 Unchecked, 5.4s Time] [2022-12-13 14:27:58,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-12-13 14:27:58,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 311. [2022-12-13 14:27:58,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 193 states have (on average 1.5544041450777202) internal successors, (300), 286 states have internal predecessors, (300), 29 states have call successors, (29), 11 states have call predecessors, (29), 11 states have return successors, (19), 16 states have call predecessors, (19), 15 states have call successors, (19) [2022-12-13 14:27:58,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 348 transitions. [2022-12-13 14:27:58,684 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 348 transitions. Word has length 67 [2022-12-13 14:27:58,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:27:58,684 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 348 transitions. [2022-12-13 14:27:58,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 41 states have (on average 2.682926829268293) internal successors, (110), 40 states have internal predecessors, (110), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 14:27:58,685 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 348 transitions. [2022-12-13 14:27:58,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-13 14:27:58,685 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:27:58,686 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:27:58,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 14:27:58,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:27:58,887 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting dll_insert_masterErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [dll_insert_masterErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 95 more)] === [2022-12-13 14:27:58,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:27:58,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1124436155, now seen corresponding path program 1 times [2022-12-13 14:27:58,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:27:58,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609615664] [2022-12-13 14:27:58,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:27:58,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:27:58,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:27:59,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 14:27:59,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:27:59,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 14:27:59,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:27:59,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 14:27:59,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:27:59,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-12-13 14:27:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:27:59,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 14:27:59,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:27:59,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 14:27:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:27:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 14:27:59,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:27:59,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609615664] [2022-12-13 14:27:59,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609615664] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:27:59,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295430074] [2022-12-13 14:27:59,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:27:59,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:27:59,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:27:59,341 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:27:59,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 14:27:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:27:59,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 14:27:59,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:27:59,585 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-13 14:27:59,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-13 14:27:59,593 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-13 14:27:59,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:27:59,756 INFO L321 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-12-13 14:27:59,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 38 [2022-12-13 14:27:59,786 INFO L321 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-12-13 14:27:59,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 38 [2022-12-13 14:27:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-13 14:27:59,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295430074] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:27:59,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:27:59,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 14 [2022-12-13 14:27:59,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21442923] [2022-12-13 14:27:59,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:27:59,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 14:27:59,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:27:59,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 14:27:59,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-12-13 14:27:59,824 INFO L87 Difference]: Start difference. First operand 311 states and 348 transitions. Second operand has 15 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2022-12-13 14:28:00,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:28:00,422 INFO L93 Difference]: Finished difference Result 309 states and 346 transitions. [2022-12-13 14:28:00,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 14:28:00,423 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 83 [2022-12-13 14:28:00,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:28:00,424 INFO L225 Difference]: With dead ends: 309 [2022-12-13 14:28:00,424 INFO L226 Difference]: Without dead ends: 309 [2022-12-13 14:28:00,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-12-13 14:28:00,424 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 189 mSDsluCounter, 1286 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 1475 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 14:28:00,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 1475 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 14:28:00,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-12-13 14:28:00,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2022-12-13 14:28:00,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 193 states have (on average 1.544041450777202) internal successors, (298), 284 states have internal predecessors, (298), 29 states have call successors, (29), 11 states have call predecessors, (29), 11 states have return successors, (19), 16 states have call predecessors, (19), 15 states have call successors, (19) [2022-12-13 14:28:00,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 346 transitions. [2022-12-13 14:28:00,431 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 346 transitions. Word has length 83 [2022-12-13 14:28:00,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:28:00,431 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 346 transitions. [2022-12-13 14:28:00,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2022-12-13 14:28:00,431 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 346 transitions. [2022-12-13 14:28:00,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-13 14:28:00,432 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:28:00,432 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:28:00,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 14:28:00,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 14:28:00,634 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting dll_insert_masterErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [dll_insert_masterErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 95 more)] === [2022-12-13 14:28:00,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:28:00,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1124436154, now seen corresponding path program 1 times [2022-12-13 14:28:00,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:28:00,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936389802] [2022-12-13 14:28:00,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:28:00,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:28:00,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:28:01,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 14:28:01,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:28:01,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 14:28:01,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:28:01,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 14:28:01,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:28:01,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-12-13 14:28:01,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:28:01,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 14:28:01,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:28:01,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 14:28:01,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:28:01,405 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-13 14:28:01,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:28:01,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936389802] [2022-12-13 14:28:01,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936389802] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:28:01,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351465548] [2022-12-13 14:28:01,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:28:01,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:28:01,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:28:01,406 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:28:01,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 14:28:01,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:28:01,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-13 14:28:01,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:28:01,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:28:01,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 14:28:01,696 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 14:28:01,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 14:28:01,709 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 14:28:01,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:28:12,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2022-12-13 14:28:12,093 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:28:12,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 62 [2022-12-13 14:28:12,201 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 14:28:12,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-12-13 14:28:12,209 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 14:28:12,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-12-13 14:28:12,266 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:28:12,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2022-12-13 14:28:12,274 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 14:28:12,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-12-13 14:28:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 14:28:12,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351465548] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:28:12,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:28:12,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 20 [2022-12-13 14:28:12,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889228682] [2022-12-13 14:28:12,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:28:12,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 14:28:12,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:28:12,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 14:28:12,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-12-13 14:28:12,331 INFO L87 Difference]: Start difference. First operand 309 states and 346 transitions. Second operand has 21 states, 17 states have (on average 4.235294117647059) internal successors, (72), 14 states have internal predecessors, (72), 9 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-12-13 14:28:13,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:28:13,445 INFO L93 Difference]: Finished difference Result 307 states and 344 transitions. [2022-12-13 14:28:13,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 14:28:13,445 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 4.235294117647059) internal successors, (72), 14 states have internal predecessors, (72), 9 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 83 [2022-12-13 14:28:13,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:28:13,446 INFO L225 Difference]: With dead ends: 307 [2022-12-13 14:28:13,446 INFO L226 Difference]: Without dead ends: 307 [2022-12-13 14:28:13,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-12-13 14:28:13,446 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 201 mSDsluCounter, 1622 mSDsCounter, 0 mSdLazyCounter, 1985 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 1810 SdHoareTripleChecker+Invalid, 2024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:28:13,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 1810 Invalid, 2024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1985 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-13 14:28:13,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-12-13 14:28:13,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2022-12-13 14:28:13,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 193 states have (on average 1.5336787564766838) internal successors, (296), 282 states have internal predecessors, (296), 29 states have call successors, (29), 11 states have call predecessors, (29), 11 states have return successors, (19), 16 states have call predecessors, (19), 15 states have call successors, (19) [2022-12-13 14:28:13,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 344 transitions. [2022-12-13 14:28:13,450 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 344 transitions. Word has length 83 [2022-12-13 14:28:13,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:28:13,450 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 344 transitions. [2022-12-13 14:28:13,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 4.235294117647059) internal successors, (72), 14 states have internal predecessors, (72), 9 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-12-13 14:28:13,451 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 344 transitions. [2022-12-13 14:28:13,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-13 14:28:13,451 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:28:13,451 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:28:13,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 14:28:13,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5150eb4-1ea4-48d2-873f-3745f57ef37a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 14:28:13,652 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting dll_insert_masterErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [dll_insert_masterErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, dll_insert_masterErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 95 more)] === [2022-12-13 14:28:13,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:28:13,652 INFO L85 PathProgramCache]: Analyzing trace with hash -603235293, now seen corresponding path program 1 times [2022-12-13 14:28:13,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:28:13,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934418631] [2022-12-13 14:28:13,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:28:13,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:28:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:28:14,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 14:28:14,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:28:15,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-12-13 14:28:15,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat