./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/n.c24.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/loops/n.c24.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 ff2f22c8c94593047c07aca289bcba7e507bc3ee948a7529dc94c8d7792bd95d --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-08 14:02:28,767 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 14:02:28,846 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 14:02:28,851 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 14:02:28,854 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 14:02:28,887 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 14:02:28,889 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 14:02:28,890 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 14:02:28,890 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 14:02:28,892 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 14:02:28,892 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 14:02:28,893 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 14:02:28,893 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 14:02:28,894 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 14:02:28,896 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 14:02:28,897 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 14:02:28,897 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 14:02:28,897 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 14:02:28,897 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 14:02:28,898 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 14:02:28,898 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 14:02:28,902 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 14:02:28,903 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 14:02:28,914 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 14:02:28,914 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 14:02:28,914 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 14:02:28,914 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 14:02:28,915 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 14:02:28,915 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 14:02:28,917 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 14:02:28,917 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 14:02:28,918 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 14:02:28,918 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 14:02:28,918 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 14:02:28,918 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 14:02:28,918 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 14:02:28,919 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 14:02:28,919 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 14:02:28,919 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 14:02:28,919 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 14:02:28,919 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 14:02:28,920 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 14:02:28,920 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff2f22c8c94593047c07aca289bcba7e507bc3ee948a7529dc94c8d7792bd95d [2024-11-08 14:02:29,180 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 14:02:29,207 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 14:02:29,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 14:02:29,211 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 14:02:29,212 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 14:02:29,213 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/n.c24.i [2024-11-08 14:02:30,661 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 14:02:30,863 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 14:02:30,865 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/n.c24.i [2024-11-08 14:02:30,875 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f82dfe0c7/8e151f3c06e840b9ace7abf8b40454cd/FLAGf5a785a07 [2024-11-08 14:02:30,892 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f82dfe0c7/8e151f3c06e840b9ace7abf8b40454cd [2024-11-08 14:02:30,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 14:02:30,895 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 14:02:30,896 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 14:02:30,897 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 14:02:30,902 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 14:02:30,902 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 02:02:30" (1/1) ... [2024-11-08 14:02:30,905 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bf980f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:02:30, skipping insertion in model container [2024-11-08 14:02:30,905 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 02:02:30" (1/1) ... [2024-11-08 14:02:30,931 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 14:02:31,097 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/n.c24.i[805,818] [2024-11-08 14:02:31,142 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 14:02:31,156 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 14:02:31,170 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/n.c24.i[805,818] [2024-11-08 14:02:31,199 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 14:02:31,223 INFO L204 MainTranslator]: Completed translation [2024-11-08 14:02:31,224 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:02:31 WrapperNode [2024-11-08 14:02:31,224 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 14:02:31,225 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 14:02:31,226 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 14:02:31,226 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 14:02:31,234 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:02:31" (1/1) ... [2024-11-08 14:02:31,244 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:02:31" (1/1) ... [2024-11-08 14:02:31,272 INFO L138 Inliner]: procedures = 68, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 159 [2024-11-08 14:02:31,274 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 14:02:31,275 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 14:02:31,275 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 14:02:31,275 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 14:02:31,284 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:02:31" (1/1) ... [2024-11-08 14:02:31,284 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:02:31" (1/1) ... [2024-11-08 14:02:31,287 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:02:31" (1/1) ... [2024-11-08 14:02:31,301 INFO L175 MemorySlicer]: Split 21 memory accesses to 4 slices as follows [2, 8, 2, 9]. 43 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0]. The 6 writes are split as follows [0, 0, 1, 5]. [2024-11-08 14:02:31,302 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:02:31" (1/1) ... [2024-11-08 14:02:31,302 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:02:31" (1/1) ... [2024-11-08 14:02:31,308 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:02:31" (1/1) ... [2024-11-08 14:02:31,311 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:02:31" (1/1) ... [2024-11-08 14:02:31,315 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:02:31" (1/1) ... [2024-11-08 14:02:31,316 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:02:31" (1/1) ... [2024-11-08 14:02:31,319 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 14:02:31,319 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 14:02:31,320 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 14:02:31,320 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 14:02:31,323 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:02:31" (1/1) ... [2024-11-08 14:02:31,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 14:02:31,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:02:31,362 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 14:02:31,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 14:02:31,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 14:02:31,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2024-11-08 14:02:31,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2024-11-08 14:02:31,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2024-11-08 14:02:31,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#3 [2024-11-08 14:02:31,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-08 14:02:31,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 14:02:31,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 14:02:31,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-08 14:02:31,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-08 14:02:31,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 14:02:31,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 14:02:31,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 14:02:31,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-08 14:02:31,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-08 14:02:31,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 14:02:31,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 14:02:31,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-08 14:02:31,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-08 14:02:31,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#0 [2024-11-08 14:02:31,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#1 [2024-11-08 14:02:31,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#2 [2024-11-08 14:02:31,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#3 [2024-11-08 14:02:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 14:02:31,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 14:02:31,517 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 14:02:31,519 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 14:02:31,743 INFO L? ?]: Removed 38 outVars from TransFormulas that were not future-live. [2024-11-08 14:02:31,743 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 14:02:31,757 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 14:02:31,757 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-08 14:02:31,758 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 02:02:31 BoogieIcfgContainer [2024-11-08 14:02:31,758 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 14:02:31,760 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 14:02:31,760 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 14:02:31,764 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 14:02:31,764 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 02:02:30" (1/3) ... [2024-11-08 14:02:31,765 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47f3b783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 02:02:31, skipping insertion in model container [2024-11-08 14:02:31,766 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:02:31" (2/3) ... [2024-11-08 14:02:31,766 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47f3b783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 02:02:31, skipping insertion in model container [2024-11-08 14:02:31,766 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 02:02:31" (3/3) ... [2024-11-08 14:02:31,768 INFO L112 eAbstractionObserver]: Analyzing ICFG n.c24.i [2024-11-08 14:02:31,791 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 14:02:31,792 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 14:02:31,836 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 14:02:31,842 INFO L333 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, 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;@2565dbda, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 14:02:31,842 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 14:02:31,846 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 32 states have (on average 1.625) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:02:31,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-08 14:02:31,850 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:02:31,851 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:02:31,851 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:02:31,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:02:31,855 INFO L85 PathProgramCache]: Analyzing trace with hash 214843119, now seen corresponding path program 1 times [2024-11-08 14:02:31,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:02:31,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442844869] [2024-11-08 14:02:31,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:02:31,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:02:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:02:32,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:02:32,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:02:32,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442844869] [2024-11-08 14:02:32,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442844869] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:02:32,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:02:32,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 14:02:32,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369515711] [2024-11-08 14:02:32,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:02:32,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 14:02:32,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:02:32,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 14:02:32,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 14:02:32,115 INFO L87 Difference]: Start difference. First operand has 34 states, 32 states have (on average 1.625) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:02:32,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:02:32,189 INFO L93 Difference]: Finished difference Result 88 states and 140 transitions. [2024-11-08 14:02:32,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 14:02:32,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-08 14:02:32,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:02:32,198 INFO L225 Difference]: With dead ends: 88 [2024-11-08 14:02:32,199 INFO L226 Difference]: Without dead ends: 53 [2024-11-08 14:02:32,201 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 14:02:32,207 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 33 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:02:32,208 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 73 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:02:32,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-08 14:02:32,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2024-11-08 14:02:32,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:02:32,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2024-11-08 14:02:32,240 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 8 [2024-11-08 14:02:32,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:02:32,240 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2024-11-08 14:02:32,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:02:32,240 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2024-11-08 14:02:32,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-08 14:02:32,241 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:02:32,241 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:02:32,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 14:02:32,242 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:02:32,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:02:32,243 INFO L85 PathProgramCache]: Analyzing trace with hash 979779318, now seen corresponding path program 1 times [2024-11-08 14:02:32,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:02:32,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668121652] [2024-11-08 14:02:32,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:02:32,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:02:32,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:02:32,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 14:02:32,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:02:32,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668121652] [2024-11-08 14:02:32,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668121652] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:02:32,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677860656] [2024-11-08 14:02:32,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:02:32,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:02:32,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:02:32,347 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) [2024-11-08 14:02:32,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 14:02:32,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:02:32,473 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-08 14:02:32,478 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:02:32,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 14:02:32,532 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:02:32,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 14:02:32,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677860656] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:02:32,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:02:32,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-08 14:02:32,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176780069] [2024-11-08 14:02:32,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:02:32,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 14:02:32,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:02:32,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 14:02:32,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-08 14:02:32,565 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:02:32,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:02:32,669 INFO L93 Difference]: Finished difference Result 128 states and 180 transitions. [2024-11-08 14:02:32,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 14:02:32,669 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-08 14:02:32,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:02:32,671 INFO L225 Difference]: With dead ends: 128 [2024-11-08 14:02:32,672 INFO L226 Difference]: Without dead ends: 101 [2024-11-08 14:02:32,673 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-08 14:02:32,674 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 176 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:02:32,675 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 136 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:02:32,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-08 14:02:32,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2024-11-08 14:02:32,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.38) internal successors, (138), 100 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:02:32,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 138 transitions. [2024-11-08 14:02:32,692 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 138 transitions. Word has length 15 [2024-11-08 14:02:32,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:02:32,693 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 138 transitions. [2024-11-08 14:02:32,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:02:32,693 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 138 transitions. [2024-11-08 14:02:32,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-08 14:02:32,695 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:02:32,695 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:02:32,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-08 14:02:32,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:02:32,896 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:02:32,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:02:32,897 INFO L85 PathProgramCache]: Analyzing trace with hash -15587406, now seen corresponding path program 2 times [2024-11-08 14:02:32,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:02:32,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401813543] [2024-11-08 14:02:32,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:02:32,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:02:32,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:02:33,204 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-08 14:02:33,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:02:33,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401813543] [2024-11-08 14:02:33,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401813543] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:02:33,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:02:33,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 14:02:33,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047106731] [2024-11-08 14:02:33,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:02:33,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 14:02:33,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:02:33,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 14:02:33,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 14:02:33,207 INFO L87 Difference]: Start difference. First operand 101 states and 138 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:02:33,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:02:33,241 INFO L93 Difference]: Finished difference Result 187 states and 260 transitions. [2024-11-08 14:02:33,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 14:02:33,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-08 14:02:33,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:02:33,243 INFO L225 Difference]: With dead ends: 187 [2024-11-08 14:02:33,243 INFO L226 Difference]: Without dead ends: 183 [2024-11-08 14:02:33,244 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 14:02:33,245 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 26 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:02:33,249 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 111 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:02:33,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-11-08 14:02:33,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 102. [2024-11-08 14:02:33,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.386138613861386) internal successors, (140), 101 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:02:33,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 140 transitions. [2024-11-08 14:02:33,274 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 140 transitions. Word has length 36 [2024-11-08 14:02:33,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:02:33,275 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 140 transitions. [2024-11-08 14:02:33,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:02:33,275 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 140 transitions. [2024-11-08 14:02:33,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-08 14:02:33,277 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:02:33,277 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:02:33,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 14:02:33,278 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:02:33,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:02:33,279 INFO L85 PathProgramCache]: Analyzing trace with hash -569704896, now seen corresponding path program 1 times [2024-11-08 14:02:33,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:02:33,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336337138] [2024-11-08 14:02:33,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:02:33,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:02:33,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:02:33,462 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-08 14:02:33,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:02:33,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336337138] [2024-11-08 14:02:33,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336337138] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:02:33,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718156529] [2024-11-08 14:02:33,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:02:33,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:02:33,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:02:33,467 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) [2024-11-08 14:02:33,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 14:02:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:02:33,565 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 14:02:33,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:02:33,596 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-08 14:02:33,596 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:02:33,672 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-08 14:02:33,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718156529] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:02:33,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:02:33,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-08 14:02:33,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900084991] [2024-11-08 14:02:33,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:02:33,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-08 14:02:33,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:02:33,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-08 14:02:33,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-08 14:02:33,675 INFO L87 Difference]: Start difference. First operand 102 states and 140 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:02:33,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:02:33,868 INFO L93 Difference]: Finished difference Result 351 states and 498 transitions. [2024-11-08 14:02:33,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 14:02:33,868 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-11-08 14:02:33,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:02:33,870 INFO L225 Difference]: With dead ends: 351 [2024-11-08 14:02:33,870 INFO L226 Difference]: Without dead ends: 260 [2024-11-08 14:02:33,871 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-08 14:02:33,872 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 408 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:02:33,872 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 296 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:02:33,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-11-08 14:02:33,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 240. [2024-11-08 14:02:33,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.389121338912134) internal successors, (332), 239 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:02:33,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 332 transitions. [2024-11-08 14:02:33,906 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 332 transitions. Word has length 41 [2024-11-08 14:02:33,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:02:33,907 INFO L471 AbstractCegarLoop]: Abstraction has 240 states and 332 transitions. [2024-11-08 14:02:33,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:02:33,907 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 332 transitions. [2024-11-08 14:02:33,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-08 14:02:33,911 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:02:33,911 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:02:33,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 14:02:34,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-08 14:02:34,116 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:02:34,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:02:34,116 INFO L85 PathProgramCache]: Analyzing trace with hash 663811572, now seen corresponding path program 2 times [2024-11-08 14:02:34,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:02:34,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589237356] [2024-11-08 14:02:34,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:02:34,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:02:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:02:34,572 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2024-11-08 14:02:34,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:02:34,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589237356] [2024-11-08 14:02:34,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589237356] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:02:34,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821079873] [2024-11-08 14:02:34,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 14:02:34,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:02:34,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:02:34,576 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) [2024-11-08 14:02:34,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 14:02:34,708 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 14:02:34,709 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 14:02:34,711 INFO L255 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 14:02:34,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:02:34,792 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2024-11-08 14:02:34,792 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:02:35,041 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2024-11-08 14:02:35,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821079873] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:02:35,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:02:35,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-11-08 14:02:35,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496915662] [2024-11-08 14:02:35,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:02:35,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-08 14:02:35,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:02:35,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-08 14:02:35,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-11-08 14:02:35,044 INFO L87 Difference]: Start difference. First operand 240 states and 332 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:02:35,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:02:35,429 INFO L93 Difference]: Finished difference Result 771 states and 1098 transitions. [2024-11-08 14:02:35,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-08 14:02:35,430 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2024-11-08 14:02:35,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:02:35,433 INFO L225 Difference]: With dead ends: 771 [2024-11-08 14:02:35,433 INFO L226 Difference]: Without dead ends: 554 [2024-11-08 14:02:35,434 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-11-08 14:02:35,435 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 1916 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1916 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 14:02:35,435 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1916 Valid, 548 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 14:02:35,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2024-11-08 14:02:35,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 516. [2024-11-08 14:02:35,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 1.3902912621359222) internal successors, (716), 515 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:02:35,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 716 transitions. [2024-11-08 14:02:35,469 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 716 transitions. Word has length 83 [2024-11-08 14:02:35,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:02:35,469 INFO L471 AbstractCegarLoop]: Abstraction has 516 states and 716 transitions. [2024-11-08 14:02:35,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:02:35,469 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 716 transitions. [2024-11-08 14:02:35,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2024-11-08 14:02:35,476 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:02:35,476 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:02:35,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 14:02:35,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:02:35,677 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:02:35,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:02:35,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1319385436, now seen corresponding path program 3 times [2024-11-08 14:02:35,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:02:35,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081498230] [2024-11-08 14:02:35,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:02:35,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:02:35,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:02:36,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1199 trivial. 0 not checked. [2024-11-08 14:02:36,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:02:36,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081498230] [2024-11-08 14:02:36,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081498230] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:02:36,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217534839] [2024-11-08 14:02:36,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 14:02:36,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:02:36,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:02:36,607 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:02:36,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 14:02:36,726 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-08 14:02:36,726 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 14:02:36,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 14:02:36,733 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:02:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1597 trivial. 0 not checked. [2024-11-08 14:02:36,861 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:02:37,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1597 trivial. 0 not checked. [2024-11-08 14:02:37,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217534839] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:02:37,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:02:37,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 6, 6] total 33 [2024-11-08 14:02:37,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998908599] [2024-11-08 14:02:37,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:02:37,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-08 14:02:37,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:02:37,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-08 14:02:37,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=730, Unknown=0, NotChecked=0, Total=1056 [2024-11-08 14:02:37,068 INFO L87 Difference]: Start difference. First operand 516 states and 716 transitions. Second operand has 33 states, 33 states have (on average 2.8484848484848486) internal successors, (94), 33 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:02:42,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:02:42,276 INFO L93 Difference]: Finished difference Result 2470 states and 3564 transitions. [2024-11-08 14:02:42,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2024-11-08 14:02:42,276 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.8484848484848486) internal successors, (94), 33 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2024-11-08 14:02:42,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:02:42,284 INFO L225 Difference]: With dead ends: 2470 [2024-11-08 14:02:42,284 INFO L226 Difference]: Without dead ends: 1998 [2024-11-08 14:02:42,295 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11992 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=8261, Invalid=21841, Unknown=0, NotChecked=0, Total=30102 [2024-11-08 14:02:42,296 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 14097 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14097 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 478 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-08 14:02:42,296 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14097 Valid, 665 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [478 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-08 14:02:42,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2024-11-08 14:02:42,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 590. [2024-11-08 14:02:42,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 1.4023769100169778) internal successors, (826), 589 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:02:42,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 826 transitions. [2024-11-08 14:02:42,337 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 826 transitions. Word has length 167 [2024-11-08 14:02:42,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:02:42,337 INFO L471 AbstractCegarLoop]: Abstraction has 590 states and 826 transitions. [2024-11-08 14:02:42,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.8484848484848486) internal successors, (94), 33 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:02:42,337 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 826 transitions. [2024-11-08 14:02:42,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2024-11-08 14:02:42,342 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:02:42,342 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:02:42,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-08 14:02:42,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:02:42,543 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:02:42,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:02:42,544 INFO L85 PathProgramCache]: Analyzing trace with hash 914783370, now seen corresponding path program 4 times [2024-11-08 14:02:42,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:02:42,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531918900] [2024-11-08 14:02:42,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:02:42,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:02:42,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:02:43,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1410 trivial. 0 not checked. [2024-11-08 14:02:43,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:02:43,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531918900] [2024-11-08 14:02:43,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531918900] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:02:43,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823288810] [2024-11-08 14:02:43,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 14:02:43,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:02:43,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:02:43,489 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:02:43,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 14:02:43,669 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 14:02:43,669 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 14:02:43,677 INFO L255 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-08 14:02:43,685 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:02:43,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1410 trivial. 0 not checked. [2024-11-08 14:02:43,767 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:02:44,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1410 trivial. 0 not checked. [2024-11-08 14:02:44,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823288810] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:02:44,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:02:44,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2024-11-08 14:02:44,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556326928] [2024-11-08 14:02:44,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:02:44,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-08 14:02:44,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:02:44,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-08 14:02:44,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2024-11-08 14:02:44,527 INFO L87 Difference]: Start difference. First operand 590 states and 826 transitions. Second operand has 51 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 51 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:02:45,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:02:45,663 INFO L93 Difference]: Finished difference Result 3058 states and 4504 transitions. [2024-11-08 14:02:45,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-08 14:02:45,663 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 51 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 189 [2024-11-08 14:02:45,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:02:45,672 INFO L225 Difference]: With dead ends: 3058 [2024-11-08 14:02:45,672 INFO L226 Difference]: Without dead ends: 2517 [2024-11-08 14:02:45,674 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2024-11-08 14:02:45,675 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 5106 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5106 SdHoareTripleChecker+Valid, 1176 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-08 14:02:45,675 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5106 Valid, 1176 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-08 14:02:45,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2517 states. [2024-11-08 14:02:45,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2517 to 1165. [2024-11-08 14:02:45,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 1.3969072164948453) internal successors, (1626), 1164 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:02:45,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 1626 transitions. [2024-11-08 14:02:45,745 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 1626 transitions. Word has length 189 [2024-11-08 14:02:45,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:02:45,745 INFO L471 AbstractCegarLoop]: Abstraction has 1165 states and 1626 transitions. [2024-11-08 14:02:45,745 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 51 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:02:45,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 1626 transitions. [2024-11-08 14:02:45,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2024-11-08 14:02:45,750 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:02:45,750 INFO L215 NwaCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 48, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:02:45,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 14:02:45,951 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:02:45,951 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:02:45,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:02:45,952 INFO L85 PathProgramCache]: Analyzing trace with hash 892851466, now seen corresponding path program 5 times [2024-11-08 14:02:45,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:02:45,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166815226] [2024-11-08 14:02:45,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:02:45,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:02:46,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:02:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8214 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5910 trivial. 0 not checked. [2024-11-08 14:02:48,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:02:48,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166815226] [2024-11-08 14:02:48,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166815226] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:02:48,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058642451] [2024-11-08 14:02:48,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 14:02:48,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:02:48,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:02:48,814 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:02:48,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process