./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_single_elem_init.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_single_elem_init.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 783ac259376d0d4b331b84c9ee3bd0ed2042af56d21e98db70a8bebb07aee3c2 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-23 19:41:01,809 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-23 19:41:01,880 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-23 19:41:01,886 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-23 19:41:01,888 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-23 19:41:01,914 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-23 19:41:01,916 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-23 19:41:01,916 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-23 19:41:01,917 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-23 19:41:01,918 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-23 19:41:01,919 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-23 19:41:01,919 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-23 19:41:01,920 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-23 19:41:01,922 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-23 19:41:01,922 INFO L153 SettingsManager]: * Use SBE=true [2024-10-23 19:41:01,923 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-23 19:41:01,923 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-23 19:41:01,923 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-23 19:41:01,924 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-23 19:41:01,924 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-23 19:41:01,924 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-23 19:41:01,928 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-23 19:41:01,928 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-23 19:41:01,929 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-23 19:41:01,929 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-23 19:41:01,929 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-23 19:41:01,929 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-23 19:41:01,930 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-23 19:41:01,930 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-23 19:41:01,930 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-23 19:41:01,930 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-23 19:41:01,931 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-23 19:41:01,931 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-23 19:41:01,931 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-23 19:41:01,932 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-23 19:41:01,932 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-23 19:41:01,932 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-23 19:41:01,932 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-23 19:41:01,933 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-23 19:41:01,933 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-23 19:41:01,933 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-23 19:41:01,935 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-23 19:41:01,935 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 783ac259376d0d4b331b84c9ee3bd0ed2042af56d21e98db70a8bebb07aee3c2 [2024-10-23 19:41:02,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-23 19:41:02,236 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-23 19:41:02,238 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-23 19:41:02,240 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-23 19:41:02,240 INFO L274 PluginConnector]: CDTParser initialized [2024-10-23 19:41:02,241 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_single_elem_init.i [2024-10-23 19:41:03,660 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-23 19:41:03,865 INFO L384 CDTParser]: Found 1 translation units. [2024-10-23 19:41:03,866 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_single_elem_init.i [2024-10-23 19:41:03,873 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f57b5cb5b/87e01b0e45c24620b5574077f1c836cb/FLAG579659ee2 [2024-10-23 19:41:03,892 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f57b5cb5b/87e01b0e45c24620b5574077f1c836cb [2024-10-23 19:41:03,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-23 19:41:03,895 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-23 19:41:03,898 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-23 19:41:03,898 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-23 19:41:03,903 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-23 19:41:03,904 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:41:03" (1/1) ... [2024-10-23 19:41:03,904 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26dfb3ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:41:03, skipping insertion in model container [2024-10-23 19:41:03,905 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:41:03" (1/1) ... [2024-10-23 19:41:03,925 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-23 19:41:04,102 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_single_elem_init.i[815,828] [2024-10-23 19:41:04,118 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-23 19:41:04,126 INFO L200 MainTranslator]: Completed pre-run [2024-10-23 19:41:04,142 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_single_elem_init.i[815,828] [2024-10-23 19:41:04,149 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-23 19:41:04,163 INFO L204 MainTranslator]: Completed translation [2024-10-23 19:41:04,164 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:41:04 WrapperNode [2024-10-23 19:41:04,164 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-23 19:41:04,165 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-23 19:41:04,165 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-23 19:41:04,165 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-23 19:41:04,171 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:41:04" (1/1) ... [2024-10-23 19:41:04,177 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:41:04" (1/1) ... [2024-10-23 19:41:04,192 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2024-10-23 19:41:04,193 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-23 19:41:04,194 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-23 19:41:04,195 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-23 19:41:04,195 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-23 19:41:04,203 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:41:04" (1/1) ... [2024-10-23 19:41:04,204 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:41:04" (1/1) ... [2024-10-23 19:41:04,205 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:41:04" (1/1) ... [2024-10-23 19:41:04,226 INFO L175 MemorySlicer]: Split 11 memory accesses to 4 slices as follows [2, 2, 3, 4]. 36 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 6 writes are split as follows [0, 1, 2, 3]. [2024-10-23 19:41:04,227 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:41:04" (1/1) ... [2024-10-23 19:41:04,227 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:41:04" (1/1) ... [2024-10-23 19:41:04,234 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:41:04" (1/1) ... [2024-10-23 19:41:04,238 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:41:04" (1/1) ... [2024-10-23 19:41:04,239 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:41:04" (1/1) ... [2024-10-23 19:41:04,240 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:41:04" (1/1) ... [2024-10-23 19:41:04,242 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-23 19:41:04,243 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-23 19:41:04,243 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-23 19:41:04,243 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-23 19:41:04,244 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:41:04" (1/1) ... [2024-10-23 19:41:04,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-23 19:41:04,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:41:04,279 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) [2024-10-23 19:41:04,281 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 [2024-10-23 19:41:04,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-23 19:41:04,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-23 19:41:04,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-23 19:41:04,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-23 19:41:04,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-23 19:41:04,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-23 19:41:04,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-23 19:41:04,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-23 19:41:04,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-23 19:41:04,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-23 19:41:04,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-23 19:41:04,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-23 19:41:04,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-23 19:41:04,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-23 19:41:04,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-23 19:41:04,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-23 19:41:04,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-23 19:41:04,415 INFO L238 CfgBuilder]: Building ICFG [2024-10-23 19:41:04,417 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-23 19:41:04,560 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-10-23 19:41:04,561 INFO L287 CfgBuilder]: Performing block encoding [2024-10-23 19:41:04,590 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-23 19:41:04,590 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-23 19:41:04,591 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:41:04 BoogieIcfgContainer [2024-10-23 19:41:04,591 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-23 19:41:04,593 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-23 19:41:04,593 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-23 19:41:04,598 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-23 19:41:04,599 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 07:41:03" (1/3) ... [2024-10-23 19:41:04,599 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64d8ae19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:41:04, skipping insertion in model container [2024-10-23 19:41:04,600 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:41:04" (2/3) ... [2024-10-23 19:41:04,600 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64d8ae19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:41:04, skipping insertion in model container [2024-10-23 19:41:04,600 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:41:04" (3/3) ... [2024-10-23 19:41:04,602 INFO L112 eAbstractionObserver]: Analyzing ICFG array_single_elem_init.i [2024-10-23 19:41:04,616 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-23 19:41:04,616 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-23 19:41:04,661 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-23 19:41:04,667 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;@69f43d28, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-23 19:41:04,667 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-23 19:41:04,671 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 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) [2024-10-23 19:41:04,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-23 19:41:04,678 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:41:04,678 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:41:04,679 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:41:04,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:41:04,686 INFO L85 PathProgramCache]: Analyzing trace with hash 451554028, now seen corresponding path program 1 times [2024-10-23 19:41:04,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:41:04,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854994093] [2024-10-23 19:41:04,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:41:04,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:41:04,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:41:04,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 19:41:04,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:41:04,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854994093] [2024-10-23 19:41:04,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854994093] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 19:41:04,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 19:41:04,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-23 19:41:04,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612805192] [2024-10-23 19:41:04,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 19:41:04,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-23 19:41:04,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:41:04,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-23 19:41:04,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-23 19:41:04,890 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 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 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:41:04,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:41:04,912 INFO L93 Difference]: Finished difference Result 27 states and 38 transitions. [2024-10-23 19:41:04,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-23 19:41:04,914 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-23 19:41:04,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:41:04,920 INFO L225 Difference]: With dead ends: 27 [2024-10-23 19:41:04,920 INFO L226 Difference]: Without dead ends: 15 [2024-10-23 19:41:04,922 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-23 19:41:04,926 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:41:04,927 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:41:04,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-10-23 19:41:04,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-10-23 19:41:04,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 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) [2024-10-23 19:41:04,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 20 transitions. [2024-10-23 19:41:04,953 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 20 transitions. Word has length 7 [2024-10-23 19:41:04,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:41:04,953 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 20 transitions. [2024-10-23 19:41:04,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:41:04,953 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 20 transitions. [2024-10-23 19:41:04,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-23 19:41:04,954 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:41:04,954 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:41:04,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-23 19:41:04,955 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:41:04,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:41:04,955 INFO L85 PathProgramCache]: Analyzing trace with hash -292803898, now seen corresponding path program 1 times [2024-10-23 19:41:04,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:41:04,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222029858] [2024-10-23 19:41:04,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:41:04,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:41:04,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:41:05,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 19:41:05,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:41:05,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222029858] [2024-10-23 19:41:05,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222029858] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 19:41:05,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 19:41:05,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-23 19:41:05,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856141760] [2024-10-23 19:41:05,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 19:41:05,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-23 19:41:05,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:41:05,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-23 19:41:05,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-23 19:41:05,084 INFO L87 Difference]: Start difference. First operand 15 states and 20 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:41:05,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:41:05,127 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2024-10-23 19:41:05,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-23 19:41:05,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-23 19:41:05,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:41:05,130 INFO L225 Difference]: With dead ends: 32 [2024-10-23 19:41:05,130 INFO L226 Difference]: Without dead ends: 24 [2024-10-23 19:41:05,130 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-23 19:41:05,132 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:41:05,132 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 15 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:41:05,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-10-23 19:41:05,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2024-10-23 19:41:05,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:41:05,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2024-10-23 19:41:05,137 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 7 [2024-10-23 19:41:05,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:41:05,138 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2024-10-23 19:41:05,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:41:05,138 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2024-10-23 19:41:05,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-23 19:41:05,139 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:41:05,139 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:41:05,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-23 19:41:05,139 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:41:05,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:41:05,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1596478078, now seen corresponding path program 1 times [2024-10-23 19:41:05,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:41:05,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112098396] [2024-10-23 19:41:05,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:41:05,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:41:05,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:41:05,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-23 19:41:05,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:41:05,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112098396] [2024-10-23 19:41:05,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112098396] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 19:41:05,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 19:41:05,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-23 19:41:05,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818939444] [2024-10-23 19:41:05,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 19:41:05,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-23 19:41:05,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:41:05,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-23 19:41:05,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-23 19:41:05,400 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-10-23 19:41:05,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:41:05,476 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2024-10-23 19:41:05,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-23 19:41:05,478 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 [2024-10-23 19:41:05,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:41:05,478 INFO L225 Difference]: With dead ends: 38 [2024-10-23 19:41:05,478 INFO L226 Difference]: Without dead ends: 22 [2024-10-23 19:41:05,479 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-23 19:41:05,480 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:41:05,480 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 33 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:41:05,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-10-23 19:41:05,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2024-10-23 19:41:05,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 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) [2024-10-23 19:41:05,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2024-10-23 19:41:05,488 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 15 [2024-10-23 19:41:05,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:41:05,488 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2024-10-23 19:41:05,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-10-23 19:41:05,489 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2024-10-23 19:41:05,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-23 19:41:05,489 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:41:05,489 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:41:05,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-23 19:41:05,490 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:41:05,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:41:05,490 INFO L85 PathProgramCache]: Analyzing trace with hash 2111683204, now seen corresponding path program 1 times [2024-10-23 19:41:05,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:41:05,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709479048] [2024-10-23 19:41:05,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:41:05,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:41:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:41:05,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-23 19:41:05,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:41:05,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709479048] [2024-10-23 19:41:05,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709479048] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:41:05,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806513525] [2024-10-23 19:41:05,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:41:05,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:41:05,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:41:05,582 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) [2024-10-23 19:41:05,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-23 19:41:05,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:41:05,662 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-23 19:41:05,667 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:41:05,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-23 19:41:05,711 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:41:05,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-23 19:41:05,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806513525] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:41:05,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:41:05,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-23 19:41:05,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442726046] [2024-10-23 19:41:05,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:41:05,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-23 19:41:05,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:41:05,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-23 19:41:05,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-23 19:41:05,750 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:41:05,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:41:05,846 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2024-10-23 19:41:05,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-23 19:41:05,847 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-23 19:41:05,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:41:05,847 INFO L225 Difference]: With dead ends: 62 [2024-10-23 19:41:05,848 INFO L226 Difference]: Without dead ends: 52 [2024-10-23 19:41:05,848 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-23 19:41:05,849 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 55 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:41:05,851 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 20 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:41:05,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-10-23 19:41:05,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2024-10-23 19:41:05,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.326086956521739) internal successors, (61), 46 states have internal predecessors, (61), 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) [2024-10-23 19:41:05,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2024-10-23 19:41:05,861 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 15 [2024-10-23 19:41:05,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:41:05,861 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2024-10-23 19:41:05,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:41:05,862 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2024-10-23 19:41:05,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-23 19:41:05,863 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:41:05,864 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-10-23 19:41:05,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-23 19:41:06,064 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:41:06,065 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:41:06,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:41:06,066 INFO L85 PathProgramCache]: Analyzing trace with hash -406487866, now seen corresponding path program 2 times [2024-10-23 19:41:06,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:41:06,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63836614] [2024-10-23 19:41:06,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:41:06,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:41:06,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:41:06,268 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-23 19:41:06,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:41:06,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63836614] [2024-10-23 19:41:06,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63836614] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:41:06,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937016005] [2024-10-23 19:41:06,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-23 19:41:06,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:41:06,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:41:06,272 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) [2024-10-23 19:41:06,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-23 19:41:06,353 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-23 19:41:06,353 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:41:06,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-23 19:41:06,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:41:06,398 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-23 19:41:06,399 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:41:06,499 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-23 19:41:06,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937016005] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:41:06,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:41:06,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-23 19:41:06,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662402735] [2024-10-23 19:41:06,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:41:06,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-23 19:41:06,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:41:06,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-23 19:41:06,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-23 19:41:06,502 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 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) [2024-10-23 19:41:06,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:41:06,689 INFO L93 Difference]: Finished difference Result 131 states and 177 transitions. [2024-10-23 19:41:06,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-23 19:41:06,690 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 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 33 [2024-10-23 19:41:06,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:41:06,692 INFO L225 Difference]: With dead ends: 131 [2024-10-23 19:41:06,692 INFO L226 Difference]: Without dead ends: 118 [2024-10-23 19:41:06,693 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-23 19:41:06,696 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 163 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-23 19:41:06,696 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 34 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-23 19:41:06,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-10-23 19:41:06,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 104. [2024-10-23 19:41:06,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.3203883495145632) internal successors, (136), 103 states have internal predecessors, (136), 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) [2024-10-23 19:41:06,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 136 transitions. [2024-10-23 19:41:06,714 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 136 transitions. Word has length 33 [2024-10-23 19:41:06,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:41:06,714 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 136 transitions. [2024-10-23 19:41:06,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 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) [2024-10-23 19:41:06,714 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 136 transitions. [2024-10-23 19:41:06,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-10-23 19:41:06,719 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:41:06,719 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2024-10-23 19:41:06,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-23 19:41:06,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:41:06,920 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:41:06,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:41:06,921 INFO L85 PathProgramCache]: Analyzing trace with hash -208243598, now seen corresponding path program 3 times [2024-10-23 19:41:06,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:41:06,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202671572] [2024-10-23 19:41:06,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:41:06,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:41:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:41:07,272 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-23 19:41:07,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:41:07,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202671572] [2024-10-23 19:41:07,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202671572] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:41:07,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376999620] [2024-10-23 19:41:07,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-23 19:41:07,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:41:07,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:41:07,276 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) [2024-10-23 19:41:07,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-23 19:41:07,379 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-10-23 19:41:07,379 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:41:07,382 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-23 19:41:07,384 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:41:07,436 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2024-10-23 19:41:07,436 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:41:07,572 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2024-10-23 19:41:07,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376999620] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:41:07,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:41:07,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 20 [2024-10-23 19:41:07,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060187081] [2024-10-23 19:41:07,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:41:07,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-23 19:41:07,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:41:07,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-23 19:41:07,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2024-10-23 19:41:07,576 INFO L87 Difference]: Start difference. First operand 104 states and 136 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 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) [2024-10-23 19:41:07,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:41:07,858 INFO L93 Difference]: Finished difference Result 226 states and 302 transitions. [2024-10-23 19:41:07,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-23 19:41:07,860 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 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 72 [2024-10-23 19:41:07,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:41:07,861 INFO L225 Difference]: With dead ends: 226 [2024-10-23 19:41:07,861 INFO L226 Difference]: Without dead ends: 204 [2024-10-23 19:41:07,862 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2024-10-23 19:41:07,862 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 231 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-23 19:41:07,863 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 61 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-23 19:41:07,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-10-23 19:41:07,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 196. [2024-10-23 19:41:07,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.2769230769230768) internal successors, (249), 195 states have internal predecessors, (249), 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) [2024-10-23 19:41:07,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 249 transitions. [2024-10-23 19:41:07,888 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 249 transitions. Word has length 72 [2024-10-23 19:41:07,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:41:07,889 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 249 transitions. [2024-10-23 19:41:07,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 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) [2024-10-23 19:41:07,890 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 249 transitions. [2024-10-23 19:41:07,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-10-23 19:41:07,895 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:41:07,895 INFO L215 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2024-10-23 19:41:07,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-23 19:41:08,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:41:08,097 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:41:08,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:41:08,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1463406460, now seen corresponding path program 4 times [2024-10-23 19:41:08,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:41:08,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042096844] [2024-10-23 19:41:08,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:41:08,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:41:08,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:41:08,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2024-10-23 19:41:08,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:41:08,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042096844] [2024-10-23 19:41:08,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042096844] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:41:08,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960494389] [2024-10-23 19:41:08,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-23 19:41:08,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:41:08,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:41:08,700 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) [2024-10-23 19:41:08,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-23 19:41:08,826 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-23 19:41:08,827 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:41:08,829 INFO L255 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-23 19:41:08,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:41:08,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2024-10-23 19:41:08,986 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:41:09,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2024-10-23 19:41:09,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960494389] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:41:09,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:41:09,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 38 [2024-10-23 19:41:09,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432081983] [2024-10-23 19:41:09,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:41:09,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-10-23 19:41:09,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:41:09,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-10-23 19:41:09,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2024-10-23 19:41:09,613 INFO L87 Difference]: Start difference. First operand 196 states and 249 transitions. Second operand has 39 states, 39 states have (on average 4.794871794871795) internal successors, (187), 38 states have internal predecessors, (187), 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) [2024-10-23 19:41:10,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:41:10,267 INFO L93 Difference]: Finished difference Result 462 states and 610 transitions. [2024-10-23 19:41:10,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-23 19:41:10,268 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.794871794871795) internal successors, (187), 38 states have internal predecessors, (187), 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 143 [2024-10-23 19:41:10,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:41:10,270 INFO L225 Difference]: With dead ends: 462 [2024-10-23 19:41:10,270 INFO L226 Difference]: Without dead ends: 404 [2024-10-23 19:41:10,271 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2024-10-23 19:41:10,272 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 665 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-23 19:41:10,272 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [665 Valid, 104 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-23 19:41:10,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2024-10-23 19:41:10,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 351. [2024-10-23 19:41:10,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 1.3171428571428572) internal successors, (461), 350 states have internal predecessors, (461), 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) [2024-10-23 19:41:10,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 461 transitions. [2024-10-23 19:41:10,302 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 461 transitions. Word has length 143 [2024-10-23 19:41:10,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:41:10,302 INFO L471 AbstractCegarLoop]: Abstraction has 351 states and 461 transitions. [2024-10-23 19:41:10,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.794871794871795) internal successors, (187), 38 states have internal predecessors, (187), 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) [2024-10-23 19:41:10,303 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 461 transitions. [2024-10-23 19:41:10,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2024-10-23 19:41:10,306 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:41:10,306 INFO L215 NwaCegarLoop]: trace histogram [36, 36, 36, 36, 36, 19, 18, 18, 1, 1, 1, 1, 1, 1] [2024-10-23 19:41:10,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-23 19:41:10,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:41:10,511 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:41:10,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:41:10,511 INFO L85 PathProgramCache]: Analyzing trace with hash 444239046, now seen corresponding path program 5 times [2024-10-23 19:41:10,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:41:10,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332579339] [2024-10-23 19:41:10,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:41:10,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:41:10,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:41:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3681 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-10-23 19:41:12,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:41:12,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332579339] [2024-10-23 19:41:12,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332579339] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:41:12,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802566805] [2024-10-23 19:41:12,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-23 19:41:12,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:41:12,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:41:12,172 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) [2024-10-23 19:41:12,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-23 19:41:17,939 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2024-10-23 19:41:17,939 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:41:17,949 INFO L255 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-23 19:41:17,959 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:41:18,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3681 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-10-23 19:41:18,193 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:41:19,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3681 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-10-23 19:41:19,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802566805] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:41:19,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:41:19,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 76 [2024-10-23 19:41:19,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154538938] [2024-10-23 19:41:19,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:41:19,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-10-23 19:41:19,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:41:19,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-10-23 19:41:19,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2024-10-23 19:41:19,973 INFO L87 Difference]: Start difference. First operand 351 states and 461 transitions. Second operand has 77 states, 77 states have (on average 4.896103896103896) internal successors, (377), 76 states have internal predecessors, (377), 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) [2024-10-23 19:41:21,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:41:21,545 INFO L93 Difference]: Finished difference Result 883 states and 1201 transitions. [2024-10-23 19:41:21,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-10-23 19:41:21,545 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 4.896103896103896) internal successors, (377), 76 states have internal predecessors, (377), 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 241 [2024-10-23 19:41:21,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:41:21,549 INFO L225 Difference]: With dead ends: 883 [2024-10-23 19:41:21,549 INFO L226 Difference]: Without dead ends: 822 [2024-10-23 19:41:21,551 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2024-10-23 19:41:21,552 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 2062 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2062 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-23 19:41:21,552 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2062 Valid, 180 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-23 19:41:21,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2024-10-23 19:41:21,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 712. [2024-10-23 19:41:21,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 1.3164556962025316) internal successors, (936), 711 states have internal predecessors, (936), 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) [2024-10-23 19:41:21,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 936 transitions. [2024-10-23 19:41:21,570 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 936 transitions. Word has length 241 [2024-10-23 19:41:21,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:41:21,571 INFO L471 AbstractCegarLoop]: Abstraction has 712 states and 936 transitions. [2024-10-23 19:41:21,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 4.896103896103896) internal successors, (377), 76 states have internal predecessors, (377), 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) [2024-10-23 19:41:21,571 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 936 transitions. [2024-10-23 19:41:21,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2024-10-23 19:41:21,583 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:41:21,583 INFO L215 NwaCegarLoop]: trace histogram [74, 74, 74, 74, 74, 38, 37, 37, 1, 1, 1, 1, 1, 1] [2024-10-23 19:41:21,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-23 19:41:21,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:41:21,784 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:41:21,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:41:21,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1388489614, now seen corresponding path program 6 times [2024-10-23 19:41:21,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:41:21,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476030866] [2024-10-23 19:41:21,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:41:21,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:41:21,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:41:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 15651 backedges. 0 proven. 13579 refuted. 0 times theorem prover too weak. 2072 trivial. 0 not checked. [2024-10-23 19:41:26,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:41:26,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476030866] [2024-10-23 19:41:26,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476030866] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:41:26,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254047945] [2024-10-23 19:41:26,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-23 19:41:26,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:41:26,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:41:26,679 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) [2024-10-23 19:41:26,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process