./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/heap-manipulation/dll_of_dll-2.i --full-output --preprocessor.use.memory.slicer true --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6ae2ee47 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/heap-manipulation/dll_of_dll-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0eca46c14885d62179341dcc13b398752af03e020a80dcf533f4c9afc7372707 --preprocessor.use.memory.slicer true --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 21:38:18,866 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 21:38:18,928 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 21:38:18,933 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 21:38:18,934 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 21:38:18,955 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 21:38:18,956 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 21:38:18,957 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 21:38:18,957 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 21:38:18,960 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 21:38:18,960 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 21:38:18,960 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 21:38:18,961 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 21:38:18,962 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 21:38:18,962 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 21:38:18,962 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 21:38:18,962 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 21:38:18,963 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 21:38:18,963 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 21:38:18,963 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 21:38:18,963 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 21:38:18,964 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 21:38:18,964 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 21:38:18,964 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 21:38:18,964 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 21:38:18,964 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 21:38:18,965 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 21:38:18,965 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 21:38:18,965 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 21:38:18,966 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 21:38:18,966 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 21:38:18,966 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 21:38:18,967 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 21:38:18,967 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 21:38:18,967 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 21:38:18,967 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 21:38:18,967 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 21:38:18,968 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 21:38:18,968 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 21:38:18,968 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 21:38:18,968 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 21:38:18,968 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 21:38:18,969 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0eca46c14885d62179341dcc13b398752af03e020a80dcf533f4c9afc7372707 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> true [2023-11-22 21:38:19,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 21:38:19,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 21:38:19,203 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 21:38:19,203 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 21:38:19,204 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 21:38:19,205 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/dll_of_dll-2.i [2023-11-22 21:38:20,105 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 21:38:20,252 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 21:38:20,255 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/dll_of_dll-2.i [2023-11-22 21:38:20,265 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f04589672/3df63c59fdcc46caae3ba67041348e0e/FLAG445c8916a [2023-11-22 21:38:20,277 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f04589672/3df63c59fdcc46caae3ba67041348e0e [2023-11-22 21:38:20,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 21:38:20,280 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 21:38:20,281 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 21:38:20,281 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 21:38:20,284 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 21:38:20,287 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:38:20" (1/1) ... [2023-11-22 21:38:20,287 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@212f5f7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:38:20, skipping insertion in model container [2023-11-22 21:38:20,287 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:38:20" (1/1) ... [2023-11-22 21:38:20,318 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 21:38:20,481 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/dll_of_dll-2.i[22634,22647] [2023-11-22 21:38:20,538 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 21:38:20,548 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 21:38:20,592 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/dll_of_dll-2.i[22634,22647] [2023-11-22 21:38:20,603 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 21:38:20,626 WARN L675 CHandler]: The function insert_fnc is called, but not defined or handled by StandardFunctionHandler. [2023-11-22 21:38:20,631 INFO L206 MainTranslator]: Completed translation [2023-11-22 21:38:20,631 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:38:20 WrapperNode [2023-11-22 21:38:20,631 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 21:38:20,632 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 21:38:20,632 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 21:38:20,632 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 21:38:20,637 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:38:20" (1/1) ... [2023-11-22 21:38:20,649 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:38:20" (1/1) ... [2023-11-22 21:38:20,666 INFO L138 Inliner]: procedures = 140, calls = 94, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 230 [2023-11-22 21:38:20,667 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 21:38:20,667 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 21:38:20,667 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 21:38:20,667 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 21:38:20,680 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:38:20" (1/1) ... [2023-11-22 21:38:20,680 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:38:20" (1/1) ... [2023-11-22 21:38:20,684 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:38:20" (1/1) ... [2023-11-22 21:38:20,732 INFO L189 HeapSplitter]: Split 48 memory accesses to 3 slices as follows [2, 40, 6] [2023-11-22 21:38:20,732 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:38:20" (1/1) ... [2023-11-22 21:38:20,733 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:38:20" (1/1) ... [2023-11-22 21:38:20,740 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:38:20" (1/1) ... [2023-11-22 21:38:20,744 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:38:20" (1/1) ... [2023-11-22 21:38:20,745 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:38:20" (1/1) ... [2023-11-22 21:38:20,746 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:38:20" (1/1) ... [2023-11-22 21:38:20,749 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 21:38:20,750 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 21:38:20,750 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 21:38:20,750 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 21:38:20,751 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:38:20" (1/1) ... [2023-11-22 21:38:20,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 21:38:20,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:38:20,774 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-22 21:38:20,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-22 21:38:20,806 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2023-11-22 21:38:20,806 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2023-11-22 21:38:20,806 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_base [2023-11-22 21:38:20,807 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_base [2023-11-22 21:38:20,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-22 21:38:20,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 21:38:20,807 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_master [2023-11-22 21:38:20,807 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_master [2023-11-22 21:38:20,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 21:38:20,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-22 21:38:20,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-22 21:38:20,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-22 21:38:20,808 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-22 21:38:20,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-22 21:38:20,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-22 21:38:20,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-22 21:38:20,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-22 21:38:20,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 21:38:20,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-22 21:38:20,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-22 21:38:20,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-22 21:38:20,809 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_generic [2023-11-22 21:38:20,809 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_generic [2023-11-22 21:38:20,809 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_slave [2023-11-22 21:38:20,809 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_slave [2023-11-22 21:38:20,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-22 21:38:20,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-22 21:38:20,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-22 21:38:20,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 21:38:20,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 21:38:20,918 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 21:38:20,920 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 21:38:21,252 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 21:38:21,289 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 21:38:21,290 INFO L309 CfgBuilder]: Removed 38 assume(true) statements. [2023-11-22 21:38:21,291 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:38:21 BoogieIcfgContainer [2023-11-22 21:38:21,291 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 21:38:21,293 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 21:38:21,293 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 21:38:21,295 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 21:38:21,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:38:20" (1/3) ... [2023-11-22 21:38:21,297 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a506ac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:38:21, skipping insertion in model container [2023-11-22 21:38:21,297 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:38:20" (2/3) ... [2023-11-22 21:38:21,299 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a506ac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:38:21, skipping insertion in model container [2023-11-22 21:38:21,299 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:38:21" (3/3) ... [2023-11-22 21:38:21,300 INFO L112 eAbstractionObserver]: Analyzing ICFG dll_of_dll-2.i [2023-11-22 21:38:21,312 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 21:38:21,312 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 21:38:21,355 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 21:38:21,361 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@4d9e0fcf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 21:38:21,361 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-22 21:38:21,364 INFO L276 IsEmpty]: Start isEmpty. Operand has 117 states, 85 states have (on average 1.8) internal successors, (153), 105 states have internal predecessors, (153), 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) [2023-11-22 21:38:21,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-22 21:38:21,370 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:38:21,371 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:38:21,371 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:38:21,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:38:21,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1364741834, now seen corresponding path program 1 times [2023-11-22 21:38:21,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:38:21,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151481681] [2023-11-22 21:38:21,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:38:21,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:38:21,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:21,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:38:21,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:21,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:38:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:21,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:38:21,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:21,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-22 21:38:21,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:38:21,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151481681] [2023-11-22 21:38:21,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151481681] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:38:21,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 21:38:21,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 21:38:21,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286505070] [2023-11-22 21:38:21,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:38:21,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 21:38:21,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:38:21,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 21:38:21,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 21:38:21,809 INFO L87 Difference]: Start difference. First operand has 117 states, 85 states have (on average 1.8) internal successors, (153), 105 states have internal predecessors, (153), 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 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 21:38:22,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:38:22,023 INFO L93 Difference]: Finished difference Result 231 states and 409 transitions. [2023-11-22 21:38:22,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 21:38:22,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-11-22 21:38:22,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:38:22,034 INFO L225 Difference]: With dead ends: 231 [2023-11-22 21:38:22,034 INFO L226 Difference]: Without dead ends: 112 [2023-11-22 21:38:22,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 21:38:22,044 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 38 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 21:38:22,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 149 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 21:38:22,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-11-22 21:38:22,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2023-11-22 21:38:22,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 82 states have (on average 1.3048780487804879) internal successors, (107), 100 states have internal predecessors, (107), 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) [2023-11-22 21:38:22,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 141 transitions. [2023-11-22 21:38:22,093 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 141 transitions. Word has length 30 [2023-11-22 21:38:22,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:38:22,094 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 141 transitions. [2023-11-22 21:38:22,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 21:38:22,094 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 141 transitions. [2023-11-22 21:38:22,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-22 21:38:22,096 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:38:22,096 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:38:22,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 21:38:22,097 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:38:22,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:38:22,098 INFO L85 PathProgramCache]: Analyzing trace with hash 208543916, now seen corresponding path program 1 times [2023-11-22 21:38:22,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:38:22,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208846511] [2023-11-22 21:38:22,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:38:22,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:38:22,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:22,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:38:22,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:22,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:38:22,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:22,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:38:22,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:38:22,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:38:22,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208846511] [2023-11-22 21:38:22,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208846511] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:38:22,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980415170] [2023-11-22 21:38:22,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:38:22,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:38:22,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:38:22,649 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:38:22,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-22 21:38:22,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:22,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-22 21:38:22,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:38:22,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:38:22,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:38:23,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:38:23,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980415170] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:38:23,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:38:23,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 7 [2023-11-22 21:38:23,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758288396] [2023-11-22 21:38:23,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:38:23,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 21:38:23,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:38:23,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 21:38:23,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-22 21:38:23,007 INFO L87 Difference]: Start difference. First operand 112 states and 141 transitions. Second operand has 7 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-22 21:38:23,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:38:23,302 INFO L93 Difference]: Finished difference Result 234 states and 308 transitions. [2023-11-22 21:38:23,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-22 21:38:23,303 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), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 31 [2023-11-22 21:38:23,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:38:23,306 INFO L225 Difference]: With dead ends: 234 [2023-11-22 21:38:23,306 INFO L226 Difference]: Without dead ends: 124 [2023-11-22 21:38:23,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-22 21:38:23,308 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 55 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 21:38:23,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 294 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 21:38:23,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-22 21:38:23,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2023-11-22 21:38:23,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 89 states have (on average 1.2921348314606742) internal successors, (115), 107 states have internal predecessors, (115), 27 states have call successors, (27), 8 states have call predecessors, (27), 7 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-22 21:38:23,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 155 transitions. [2023-11-22 21:38:23,336 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 155 transitions. Word has length 31 [2023-11-22 21:38:23,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:38:23,336 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 155 transitions. [2023-11-22 21:38:23,336 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), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-22 21:38:23,337 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 155 transitions. [2023-11-22 21:38:23,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-22 21:38:23,340 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:38:23,340 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:38:23,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-22 21:38:23,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:38:23,552 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:38:23,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:38:23,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1337816308, now seen corresponding path program 1 times [2023-11-22 21:38:23,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:38:23,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011531155] [2023-11-22 21:38:23,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:38:23,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:38:23,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:24,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:38:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:24,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:38:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:24,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-22 21:38:24,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:25,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:38:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:25,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-22 21:38:25,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:25,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:38:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:25,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:38:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:25,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-22 21:38:25,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:25,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-22 21:38:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:25,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:38:25,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:25,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-22 21:38:25,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:25,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:38:25,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:25,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:38:25,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:25,654 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 12 proven. 56 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-22 21:38:25,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:38:25,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011531155] [2023-11-22 21:38:25,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011531155] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:38:25,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522296023] [2023-11-22 21:38:25,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:38:25,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:38:25,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:38:25,660 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:38:25,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-22 21:38:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:25,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 1068 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-22 21:38:25,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:38:26,087 INFO L378 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 15 treesize of output 1 [2023-11-22 21:38:26,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-22 21:38:26,171 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-11-22 21:38:26,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:38:26,402 INFO L378 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 30 treesize of output 26 [2023-11-22 21:38:26,408 INFO L378 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 30 treesize of output 26 [2023-11-22 21:38:26,482 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-11-22 21:38:26,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522296023] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:38:26,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:38:26,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2023-11-22 21:38:26,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762407972] [2023-11-22 21:38:26,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:38:26,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-22 21:38:26,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:38:26,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-22 21:38:26,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2023-11-22 21:38:26,484 INFO L87 Difference]: Start difference. First operand 124 states and 155 transitions. Second operand has 21 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 7 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2023-11-22 21:38:27,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:38:27,402 INFO L93 Difference]: Finished difference Result 317 states and 407 transitions. [2023-11-22 21:38:27,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-22 21:38:27,402 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 7 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 91 [2023-11-22 21:38:27,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:38:27,404 INFO L225 Difference]: With dead ends: 317 [2023-11-22 21:38:27,404 INFO L226 Difference]: Without dead ends: 197 [2023-11-22 21:38:27,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2023-11-22 21:38:27,405 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 164 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 1334 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1353 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-22 21:38:27,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1353 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1334 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-22 21:38:27,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-11-22 21:38:27,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 158. [2023-11-22 21:38:27,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 121 states have (on average 1.2727272727272727) internal successors, (154), 137 states have internal predecessors, (154), 27 states have call successors, (27), 11 states have call predecessors, (27), 9 states have return successors, (14), 11 states have call predecessors, (14), 13 states have call successors, (14) [2023-11-22 21:38:27,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 195 transitions. [2023-11-22 21:38:27,418 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 195 transitions. Word has length 91 [2023-11-22 21:38:27,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:38:27,418 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 195 transitions. [2023-11-22 21:38:27,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 7 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2023-11-22 21:38:27,418 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 195 transitions. [2023-11-22 21:38:27,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-22 21:38:27,419 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:38:27,419 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-22 21:38:27,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-22 21:38:27,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-22 21:38:27,632 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:38:27,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:38:27,632 INFO L85 PathProgramCache]: Analyzing trace with hash 960775938, now seen corresponding path program 1 times [2023-11-22 21:38:27,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:38:27,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712179363] [2023-11-22 21:38:27,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:38:27,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:38:27,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:28,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:38:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:28,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:38:28,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:28,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-22 21:38:28,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:28,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:38:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:28,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-22 21:38:28,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:28,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:38:28,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:28,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:38:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:28,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-22 21:38:28,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:29,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-22 21:38:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:29,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:38:29,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:29,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-22 21:38:29,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:29,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:38:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:29,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:38:29,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:29,254 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 25 proven. 19 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-22 21:38:29,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:38:29,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712179363] [2023-11-22 21:38:29,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712179363] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:38:29,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781216514] [2023-11-22 21:38:29,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:38:29,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:38:29,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:38:29,257 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:38:29,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-22 21:38:29,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:29,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 1092 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-22 21:38:29,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:38:29,650 INFO L378 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 15 treesize of output 1 [2023-11-22 21:38:29,708 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 29 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-22 21:38:29,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:38:30,218 INFO L378 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 30 treesize of output 26 [2023-11-22 21:38:30,226 INFO L378 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 30 treesize of output 26 [2023-11-22 21:38:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 27 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-22 21:38:30,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781216514] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:38:30,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:38:30,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 15] total 23 [2023-11-22 21:38:30,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286998360] [2023-11-22 21:38:30,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:38:30,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-22 21:38:30,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:38:30,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-22 21:38:30,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2023-11-22 21:38:30,303 INFO L87 Difference]: Start difference. First operand 158 states and 195 transitions. Second operand has 23 states, 20 states have (on average 2.75) internal successors, (55), 17 states have internal predecessors, (55), 10 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (13), 8 states have call predecessors, (13), 9 states have call successors, (13) [2023-11-22 21:38:31,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:38:31,076 INFO L93 Difference]: Finished difference Result 324 states and 402 transitions. [2023-11-22 21:38:31,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-22 21:38:31,076 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.75) internal successors, (55), 17 states have internal predecessors, (55), 10 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (13), 8 states have call predecessors, (13), 9 states have call successors, (13) Word has length 94 [2023-11-22 21:38:31,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:38:31,080 INFO L225 Difference]: With dead ends: 324 [2023-11-22 21:38:31,080 INFO L226 Difference]: Without dead ends: 169 [2023-11-22 21:38:31,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=244, Invalid=1238, Unknown=0, NotChecked=0, Total=1482 [2023-11-22 21:38:31,082 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 114 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-22 21:38:31,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1154 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1103 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-22 21:38:31,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-11-22 21:38:31,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2023-11-22 21:38:31,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 127 states have (on average 1.2519685039370079) internal successors, (159), 144 states have internal predecessors, (159), 29 states have call successors, (29), 12 states have call predecessors, (29), 11 states have return successors, (18), 13 states have call predecessors, (18), 15 states have call successors, (18) [2023-11-22 21:38:31,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 206 transitions. [2023-11-22 21:38:31,100 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 206 transitions. Word has length 94 [2023-11-22 21:38:31,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:38:31,101 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 206 transitions. [2023-11-22 21:38:31,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.75) internal successors, (55), 17 states have internal predecessors, (55), 10 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (13), 8 states have call predecessors, (13), 9 states have call successors, (13) [2023-11-22 21:38:31,101 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 206 transitions. [2023-11-22 21:38:31,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-22 21:38:31,106 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:38:31,106 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-22 21:38:31,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-22 21:38:31,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:38:31,316 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:38:31,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:38:31,317 INFO L85 PathProgramCache]: Analyzing trace with hash 67289600, now seen corresponding path program 1 times [2023-11-22 21:38:31,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:38:31,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702471201] [2023-11-22 21:38:31,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:38:31,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:38:31,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:33,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:38:33,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:35,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:38:35,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:35,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-22 21:38:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:35,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:38:35,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:35,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-22 21:38:35,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:35,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:38:35,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:35,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:38:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:35,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-22 21:38:35,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:36,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-22 21:38:36,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:37,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:38:37,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:38:37,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-22 21:38:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15