./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/recursified_loop-simple/recursified_nested_1b.c --full-output --preprocessor.use.memory.slicer true --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6ae2ee47 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/recursified_loop-simple/recursified_nested_1b.c -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 4b2397f02ca31d86bec1660af6a105f36402aae0113477a6332673f13a213eff --preprocessor.use.memory.slicer true --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 18:06:08,504 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 18:06:08,567 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 18:06:08,570 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 18:06:08,574 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 18:06:08,598 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 18:06:08,600 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 18:06:08,601 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 18:06:08,601 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 18:06:08,605 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 18:06:08,605 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 18:06:08,606 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 18:06:08,607 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 18:06:08,608 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 18:06:08,608 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 18:06:08,608 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 18:06:08,608 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 18:06:08,608 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 18:06:08,609 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 18:06:08,609 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 18:06:08,609 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 18:06:08,609 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 18:06:08,610 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 18:06:08,610 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 18:06:08,610 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 18:06:08,610 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 18:06:08,610 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 18:06:08,611 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 18:06:08,611 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 18:06:08,611 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 18:06:08,612 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 18:06:08,612 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 18:06:08,613 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 18:06:08,613 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 18:06:08,613 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 18:06:08,613 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 18:06:08,613 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 18:06:08,613 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 18:06:08,614 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 18:06:08,614 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 18:06:08,614 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 18:06:08,614 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 18:06:08,614 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b2397f02ca31d86bec1660af6a105f36402aae0113477a6332673f13a213eff Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> true [2023-11-22 18:06:08,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 18:06:08,850 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 18:06:08,851 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 18:06:08,852 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 18:06:08,852 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 18:06:08,853 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursified_loop-simple/recursified_nested_1b.c [2023-11-22 18:06:09,990 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 18:06:10,137 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 18:06:10,138 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursified_loop-simple/recursified_nested_1b.c [2023-11-22 18:06:10,143 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2f959fe2/0cd2e73915634e15a6a4a1a4a8c9e006/FLAGa35362c1b [2023-11-22 18:06:10,158 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2f959fe2/0cd2e73915634e15a6a4a1a4a8c9e006 [2023-11-22 18:06:10,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 18:06:10,161 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 18:06:10,162 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 18:06:10,162 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 18:06:10,166 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 18:06:10,168 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 06:06:10" (1/1) ... [2023-11-22 18:06:10,168 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2205b73a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:06:10, skipping insertion in model container [2023-11-22 18:06:10,168 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 06:06:10" (1/1) ... [2023-11-22 18:06:10,186 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 18:06:10,281 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursified_loop-simple/recursified_nested_1b.c[1277,1290] [2023-11-22 18:06:10,284 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 18:06:10,293 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 18:06:10,303 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursified_loop-simple/recursified_nested_1b.c[1277,1290] [2023-11-22 18:06:10,303 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 18:06:10,313 INFO L206 MainTranslator]: Completed translation [2023-11-22 18:06:10,313 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:06:10 WrapperNode [2023-11-22 18:06:10,313 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 18:06:10,314 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 18:06:10,314 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 18:06:10,315 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 18:06:10,346 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:06:10" (1/1) ... [2023-11-22 18:06:10,350 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:06:10" (1/1) ... [2023-11-22 18:06:10,362 INFO L138 Inliner]: procedures = 12, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2023-11-22 18:06:10,362 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 18:06:10,363 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 18:06:10,364 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 18:06:10,364 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 18:06:10,371 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:06:10" (1/1) ... [2023-11-22 18:06:10,371 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:06:10" (1/1) ... [2023-11-22 18:06:10,372 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:06:10" (1/1) ... [2023-11-22 18:06:10,389 INFO L189 HeapSplitter]: Split 8 memory accesses to 2 slices as follows [2, 6] [2023-11-22 18:06:10,389 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:06:10" (1/1) ... [2023-11-22 18:06:10,390 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:06:10" (1/1) ... [2023-11-22 18:06:10,392 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:06:10" (1/1) ... [2023-11-22 18:06:10,393 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:06:10" (1/1) ... [2023-11-22 18:06:10,393 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:06:10" (1/1) ... [2023-11-22 18:06:10,394 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:06:10" (1/1) ... [2023-11-22 18:06:10,395 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 18:06:10,396 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 18:06:10,396 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 18:06:10,396 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 18:06:10,396 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:06:10" (1/1) ... [2023-11-22 18:06:10,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 18:06:10,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:06:10,435 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-22 18:06:10,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-22 18:06:10,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-22 18:06:10,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-22 18:06:10,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 18:06:10,468 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_19_to_19_0 [2023-11-22 18:06:10,468 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_19_to_19_0 [2023-11-22 18:06:10,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 18:06:10,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 18:06:10,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-22 18:06:10,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-22 18:06:10,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-22 18:06:10,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-22 18:06:10,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 18:06:10,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 18:06:10,514 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 18:06:10,516 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 18:06:10,589 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 18:06:10,609 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 18:06:10,609 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-22 18:06:10,609 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 06:06:10 BoogieIcfgContainer [2023-11-22 18:06:10,609 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 18:06:10,611 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 18:06:10,611 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 18:06:10,614 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 18:06:10,614 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 06:06:10" (1/3) ... [2023-11-22 18:06:10,614 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@679ce6af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 06:06:10, skipping insertion in model container [2023-11-22 18:06:10,614 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:06:10" (2/3) ... [2023-11-22 18:06:10,615 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@679ce6af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 06:06:10, skipping insertion in model container [2023-11-22 18:06:10,615 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 06:06:10" (3/3) ... [2023-11-22 18:06:10,615 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_nested_1b.c [2023-11-22 18:06:10,628 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 18:06:10,628 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 18:06:10,660 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 18:06:10,665 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@712bfe5d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 18:06:10,665 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-22 18:06:10,667 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 10 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-22 18:06:10,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-22 18:06:10,673 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:06:10,673 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:06:10,674 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:06:10,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:06:10,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1146450700, now seen corresponding path program 1 times [2023-11-22 18:06:10,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:06:10,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862251213] [2023-11-22 18:06:10,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:06:10,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:06:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:06:10,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 18:06:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:06:11,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:06:11,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:06:11,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862251213] [2023-11-22 18:06:11,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862251213] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:06:11,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:06:11,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-22 18:06:11,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475595142] [2023-11-22 18:06:11,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:06:11,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-22 18:06:11,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:06:11,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-22 18:06:11,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-22 18:06:11,046 INFO L87 Difference]: Start difference. First operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 10 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-22 18:06:11,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:06:11,140 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2023-11-22 18:06:11,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 18:06:11,143 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-11-22 18:06:11,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:06:11,150 INFO L225 Difference]: With dead ends: 21 [2023-11-22 18:06:11,150 INFO L226 Difference]: Without dead ends: 13 [2023-11-22 18:06:11,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-22 18:06:11,154 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:06:11,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 30 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 18:06:11,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-22 18:06:11,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-11-22 18:06:11,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 9 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 18:06:11,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-11-22 18:06:11,227 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2023-11-22 18:06:11,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:06:11,230 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-11-22 18:06:11,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-22 18:06:11,230 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-11-22 18:06:11,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-22 18:06:11,232 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:06:11,232 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:06:11,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 18:06:11,232 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:06:11,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:06:11,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1151650808, now seen corresponding path program 1 times [2023-11-22 18:06:11,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:06:11,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468568707] [2023-11-22 18:06:11,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:06:11,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:06:11,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:06:11,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 18:06:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:06:11,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-22 18:06:11,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:06:11,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:06:11,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:06:11,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468568707] [2023-11-22 18:06:11,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468568707] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:06:11,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574278197] [2023-11-22 18:06:11,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:06:11,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:06:11,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:06:11,645 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:06:11,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-22 18:06:11,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:06:11,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-22 18:06:11,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:06:11,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-22 18:06:11,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-22 18:06:11,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-22 18:06:11,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:06:11,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:06:12,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-22 18:06:12,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:06:12,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574278197] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:06:12,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:06:12,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 21 [2023-11-22 18:06:12,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601504244] [2023-11-22 18:06:12,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:06:12,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-22 18:06:12,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:06:12,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-22 18:06:12,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2023-11-22 18:06:12,168 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-22 18:06:12,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:06:12,292 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2023-11-22 18:06:12,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-22 18:06:12,293 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 14 [2023-11-22 18:06:12,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:06:12,293 INFO L225 Difference]: With dead ends: 19 [2023-11-22 18:06:12,293 INFO L226 Difference]: Without dead ends: 15 [2023-11-22 18:06:12,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2023-11-22 18:06:12,295 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:06:12,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 67 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:06:12,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-22 18:06:12,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-22 18:06:12,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 10 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-22 18:06:12,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2023-11-22 18:06:12,298 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 14 [2023-11-22 18:06:12,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:06:12,299 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2023-11-22 18:06:12,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-22 18:06:12,299 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2023-11-22 18:06:12,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-22 18:06:12,300 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:06:12,300 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:06:12,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-22 18:06:12,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:06:12,511 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:06:12,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:06:12,512 INFO L85 PathProgramCache]: Analyzing trace with hash 8320110, now seen corresponding path program 2 times [2023-11-22 18:06:12,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:06:12,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178483522] [2023-11-22 18:06:12,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:06:12,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:06:12,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:06:12,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 18:06:12,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:06:12,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-22 18:06:12,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:06:12,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-22 18:06:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:06:12,953 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 18:06:12,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:06:12,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178483522] [2023-11-22 18:06:12,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178483522] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:06:12,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754968761] [2023-11-22 18:06:12,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:06:12,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:06:12,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:06:12,955 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:06:12,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-22 18:06:12,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:06:12,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:06:13,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-22 18:06:13,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:06:13,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-22 18:06:13,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-22 18:06:13,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-22 18:06:13,159 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 18:06:13,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:06:13,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-22 18:06:13,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754968761] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:06:13,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 18:06:13,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2023-11-22 18:06:13,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815863227] [2023-11-22 18:06:13,439 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 18:06:13,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-22 18:06:13,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:06:13,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-22 18:06:13,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2023-11-22 18:06:13,441 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 19 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 16 states have internal predecessors, (24), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-22 18:06:13,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:06:13,566 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2023-11-22 18:06:13,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-22 18:06:13,566 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 16 states have internal predecessors, (24), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 19 [2023-11-22 18:06:13,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:06:13,575 INFO L225 Difference]: With dead ends: 21 [2023-11-22 18:06:13,576 INFO L226 Difference]: Without dead ends: 17 [2023-11-22 18:06:13,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2023-11-22 18:06:13,577 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 12 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:06:13,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 74 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:06:13,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-22 18:06:13,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-22 18:06:13,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-22 18:06:13,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-11-22 18:06:13,581 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 19 [2023-11-22 18:06:13,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:06:13,581 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-11-22 18:06:13,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 16 states have internal predecessors, (24), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-22 18:06:13,581 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-11-22 18:06:13,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-22 18:06:13,582 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:06:13,582 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:06:13,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-22 18:06:13,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-22 18:06:13,796 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:06:13,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:06:13,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1489619010, now seen corresponding path program 3 times [2023-11-22 18:06:13,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:06:13,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845033690] [2023-11-22 18:06:13,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:06:13,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:06:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:06:13,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 18:06:13,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:06:14,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-22 18:06:14,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:06:14,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-22 18:06:14,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:06:14,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-22 18:06:14,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:06:14,286 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:06:14,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:06:14,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845033690] [2023-11-22 18:06:14,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845033690] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:06:14,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593732073] [2023-11-22 18:06:14,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 18:06:14,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:06:14,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:06:14,300 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:06:14,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-22 18:06:14,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-22 18:06:14,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:06:14,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-22 18:06:14,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:06:14,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-22 18:06:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 18:06:14,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:06:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:06:15,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593732073] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:06:15,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:06:15,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 17] total 38 [2023-11-22 18:06:15,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716224252] [2023-11-22 18:06:15,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:06:15,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-22 18:06:15,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:06:15,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-22 18:06:15,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1212, Unknown=0, NotChecked=0, Total=1482 [2023-11-22 18:06:15,312 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 39 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 32 states have internal predecessors, (40), 10 states have call successors, (10), 6 states have call predecessors, (10), 12 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2023-11-22 18:06:15,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:06:15,526 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2023-11-22 18:06:15,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-22 18:06:15,527 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 32 states have internal predecessors, (40), 10 states have call successors, (10), 6 states have call predecessors, (10), 12 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) Word has length 24 [2023-11-22 18:06:15,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:06:15,528 INFO L225 Difference]: With dead ends: 27 [2023-11-22 18:06:15,528 INFO L226 Difference]: Without dead ends: 21 [2023-11-22 18:06:15,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=395, Invalid=1767, Unknown=0, NotChecked=0, Total=2162 [2023-11-22 18:06:15,529 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:06:15,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 92 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:06:15,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-22 18:06:15,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-22 18:06:15,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-22 18:06:15,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-11-22 18:06:15,533 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 24 [2023-11-22 18:06:15,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:06:15,533 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-11-22 18:06:15,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 32 states have internal predecessors, (40), 10 states have call successors, (10), 6 states have call predecessors, (10), 12 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2023-11-22 18:06:15,533 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-11-22 18:06:15,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-22 18:06:15,534 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:06:15,534 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:06:15,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-22 18:06:15,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:06:15,746 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:06:15,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:06:15,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1362462852, now seen corresponding path program 4 times [2023-11-22 18:06:15,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:06:15,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7749589] [2023-11-22 18:06:15,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:06:15,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:06:15,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:06:15,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 18:06:15,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:06:16,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-22 18:06:16,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:06:16,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-22 18:06:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:06:16,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-22 18:06:16,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:06:16,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-22 18:06:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:06:16,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-22 18:06:16,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:06:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 35 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-22 18:06:16,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:06:16,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7749589] [2023-11-22 18:06:16,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7749589] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:06:16,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657267755] [2023-11-22 18:06:16,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 18:06:16,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:06:16,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:06:16,502 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) [2023-11-22 18:06:16,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-22 18:06:16,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 18:06:16,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:06:16,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 77 conjunts are in the unsatisfiable core [2023-11-22 18:06:16,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:06:16,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-22 18:06:16,812 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-22 18:06:16,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:06:18,233 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:06:18,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657267755] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:06:18,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:06:18,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 25] total 43 [2023-11-22 18:06:18,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105736138] [2023-11-22 18:06:18,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:06:18,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-22 18:06:18,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:06:18,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-22 18:06:18,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=1557, Unknown=0, NotChecked=0, Total=1892 [2023-11-22 18:06:18,236 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 44 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 11 states have call successors, (11), 8 states have call predecessors, (11), 13 states have return successors, (18), 12 states have call predecessors, (18), 11 states have call successors, (18) [2023-11-22 18:06:18,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:06:18,501 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2023-11-22 18:06:18,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-22 18:06:18,503 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 11 states have call successors, (11), 8 states have call predecessors, (11), 13 states have return successors, (18), 12 states have call predecessors, (18), 11 states have call successors, (18) Word has length 34 [2023-11-22 18:06:18,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:06:18,503 INFO L225 Difference]: With dead ends: 27 [2023-11-22 18:06:18,503 INFO L226 Difference]: Without dead ends: 23 [2023-11-22 18:06:18,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=487, Invalid=2165, Unknown=0, NotChecked=0, Total=2652 [2023-11-22 18:06:18,505 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:06:18,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 155 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:06:18,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-22 18:06:18,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-22 18:06:18,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 14 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-22 18:06:18,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2023-11-22 18:06:18,508 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 34 [2023-11-22 18:06:18,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:06:18,508 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2023-11-22 18:06:18,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 11 states have call successors, (11), 8 states have call predecessors, (11), 13 states have return successors, (18), 12 states have call predecessors, (18), 11 states have call successors, (18) [2023-11-22 18:06:18,509 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2023-11-22 18:06:18,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-22 18:06:18,509 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:06:18,509 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:06:18,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-22 18:06:18,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:06:18,710 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:06:18,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:06:18,711 INFO L85 PathProgramCache]: Analyzing trace with hash -2002779038, now seen corresponding path program 5 times [2023-11-22 18:06:18,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:06:18,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906634612] [2023-11-22 18:06:18,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:06:18,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:06:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-22 18:06:18,726 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-22 18:06:18,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-22 18:06:18,762 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-22 18:06:18,762 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-22 18:06:18,763 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-22 18:06:18,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-22 18:06:18,767 INFO L445 BasicCegarLoop]: Path program histogram: [5, 1] [2023-11-22 18:06:18,770 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-22 18:06:18,786 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated [2023-11-22 18:06:18,787 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated [2023-11-22 18:06:18,788 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated [2023-11-22 18:06:18,788 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated [2023-11-22 18:06:18,788 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated [2023-11-22 18:06:18,789 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated [2023-11-22 18:06:18,789 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated [2023-11-22 18:06:18,798 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 06:06:18 BoogieIcfgContainer [2023-11-22 18:06:18,798 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-22 18:06:18,798 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-22 18:06:18,799 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-22 18:06:18,799 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-22 18:06:18,799 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 06:06:10" (3/4) ... [2023-11-22 18:06:18,800 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-22 18:06:18,812 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated [2023-11-22 18:06:18,813 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated [2023-11-22 18:06:18,813 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated [2023-11-22 18:06:18,813 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated [2023-11-22 18:06:18,814 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated [2023-11-22 18:06:18,814 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated [2023-11-22 18:06:18,817 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated [2023-11-22 18:06:18,854 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-11-22 18:06:18,854 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-22 18:06:18,854 INFO L158 Benchmark]: Toolchain (without parser) took 8693.35ms. Allocated memory was 167.8MB in the beginning and 346.0MB in the end (delta: 178.3MB). Free memory was 96.6MB in the beginning and 273.8MB in the end (delta: -177.2MB). Peak memory consumption was 1.2MB. Max. memory is 16.1GB. [2023-11-22 18:06:18,855 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 167.8MB. Free memory is still 122.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-22 18:06:18,855 INFO L158 Benchmark]: CACSL2BoogieTranslator took 151.61ms. Allocated memory is still 167.8MB. Free memory was 96.4MB in the beginning and 86.6MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-22 18:06:18,855 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.30ms. Allocated memory is still 167.8MB. Free memory was 86.5MB in the beginning and 138.3MB in the end (delta: -51.8MB). Peak memory consumption was 5.5MB. Max. memory is 16.1GB. [2023-11-22 18:06:18,856 INFO L158 Benchmark]: Boogie Preprocessor took 31.68ms. Allocated memory is still 167.8MB. Free memory was 138.3MB in the beginning and 139.7MB in the end (delta: -1.4MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2023-11-22 18:06:18,856 INFO L158 Benchmark]: RCFGBuilder took 213.89ms. Allocated memory is still 167.8MB. Free memory was 139.7MB in the beginning and 128.2MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-22 18:06:18,856 INFO L158 Benchmark]: TraceAbstraction took 8187.10ms. Allocated memory was 167.8MB in the beginning and 346.0MB in the end (delta: 178.3MB). Free memory was 128.2MB in the beginning and 277.0MB in the end (delta: -148.8MB). Peak memory consumption was 30.5MB. Max. memory is 16.1GB. [2023-11-22 18:06:18,857 INFO L158 Benchmark]: Witness Printer took 55.43ms. Allocated memory is still 346.0MB. Free memory was 277.0MB in the beginning and 273.8MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-22 18:06:18,860 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 167.8MB. Free memory is still 122.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 151.61ms. Allocated memory is still 167.8MB. Free memory was 96.4MB in the beginning and 86.6MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.30ms. Allocated memory is still 167.8MB. Free memory was 86.5MB in the beginning and 138.3MB in the end (delta: -51.8MB). Peak memory consumption was 5.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 31.68ms. Allocated memory is still 167.8MB. Free memory was 138.3MB in the beginning and 139.7MB in the end (delta: -1.4MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. * RCFGBuilder took 213.89ms. Allocated memory is still 167.8MB. Free memory was 139.7MB in the beginning and 128.2MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 8187.10ms. Allocated memory was 167.8MB in the beginning and 346.0MB in the end (delta: 178.3MB). Free memory was 128.2MB in the beginning and 277.0MB in the end (delta: -148.8MB). Peak memory consumption was 30.5MB. Max. memory is 16.1GB. * Witness Printer took 55.43ms. Allocated memory is still 346.0MB. Free memory was 277.0MB in the beginning and 273.8MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 48]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L41] int a = 6; [L41] int a = 6; [L43] a = 0 [L44] CALL func_to_recursive_line_19_to_19_0(&a) VAL [a={7:0}] [L25] EXPR \read(*a) VAL [a={7:0}, a={7:0}] [L25] COND TRUE (*a) < 6 [L30] EXPR \read(*a) [L30] ++(*a) [L30] ++(*a) [L32] CALL func_to_recursive_line_19_to_19_0(a) VAL [a={7:0}] [L25] EXPR \read(*a) VAL [a={7:0}, a={7:0}] [L25] COND TRUE (*a) < 6 [L30] EXPR \read(*a) [L30] ++(*a) [L30] ++(*a) [L32] CALL func_to_recursive_line_19_to_19_0(a) VAL [a={7:0}] [L25] EXPR \read(*a) VAL [a={7:0}, a={7:0}] [L25] COND TRUE (*a) < 6 [L30] EXPR \read(*a) [L30] ++(*a) [L30] ++(*a) [L32] CALL func_to_recursive_line_19_to_19_0(a) VAL [a={7:0}] [L25] EXPR \read(*a) VAL [a={7:0}, a={7:0}] [L25] COND TRUE (*a) < 6 [L30] EXPR \read(*a) [L30] ++(*a) [L30] ++(*a) [L32] CALL func_to_recursive_line_19_to_19_0(a) VAL [a={7:0}] [L25] EXPR \read(*a) VAL [a={7:0}, a={7:0}] [L25] COND TRUE (*a) < 6 [L30] EXPR \read(*a) [L30] ++(*a) [L30] ++(*a) [L32] CALL func_to_recursive_line_19_to_19_0(a) VAL [a={7:0}] [L25] EXPR \read(*a) VAL [a={7:0}, a={7:0}] [L25] COND TRUE (*a) < 6 [L30] EXPR \read(*a) [L30] ++(*a) [L30] ++(*a) [L32] CALL func_to_recursive_line_19_to_19_0(a) VAL [a={7:0}] [L25] EXPR \read(*a) VAL [a={7:0}, a={7:0}] [L25] COND FALSE !((*a) < 6) [L32] RET func_to_recursive_line_19_to_19_0(a) VAL [a={7:0}, a={7:0}] [L32] RET func_to_recursive_line_19_to_19_0(a) VAL [a={7:0}, a={7:0}] [L32] RET func_to_recursive_line_19_to_19_0(a) VAL [a={7:0}, a={7:0}] [L32] RET func_to_recursive_line_19_to_19_0(a) VAL [a={7:0}, a={7:0}] [L32] RET func_to_recursive_line_19_to_19_0(a) VAL [a={7:0}, a={7:0}] [L32] RET func_to_recursive_line_19_to_19_0(a) VAL [a={7:0}, a={7:0}] [L44] RET func_to_recursive_line_19_to_19_0(&a) VAL [a={7:0}] [L46] EXPR \read(a) [L46] COND TRUE a == 6 [L48] reach_error() VAL [a={7:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.1s, OverallIterations: 6, TraceHistogramMax: 7, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 59 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 59 mSDsluCounter, 418 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 373 mSDsCounter, 21 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 607 IncrementalHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 21 mSolverCounterUnsat, 45 mSDtfsCounter, 607 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 262 GetRequests, 105 SyntacticMatches, 5 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1990 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=5, InterpolantAutomatonStates: 48, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 230 NumberOfCodeBlocks, 230 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 251 ConstructedInterpolants, 4 QuantifiedInterpolants, 2678 SizeOfPredicates, 38 NumberOfNonLiveVariables, 475 ConjunctsInSsa, 180 ConjunctsInUnsatCore, 12 InterpolantComputations, 1 PerfectInterpolantSequences, 101/329 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-11-22 18:06:18,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE