./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.factorial4even.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.factorial4even.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 64bit --witnessprinter.graph.data.programhash a9bfc0bfd402f01a909df8198af653a6c40e8b771ded2d89ed782f9da2aa5bbb --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 06:04:48,189 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 06:04:48,287 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2024-10-11 06:04:48,292 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 06:04:48,295 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 06:04:48,329 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 06:04:48,330 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 06:04:48,330 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 06:04:48,331 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 06:04:48,331 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 06:04:48,332 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 06:04:48,332 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 06:04:48,333 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 06:04:48,333 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 06:04:48,334 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 06:04:48,334 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 06:04:48,334 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 06:04:48,335 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 06:04:48,335 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 06:04:48,336 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 06:04:48,336 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 06:04:48,337 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 06:04:48,337 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 06:04:48,337 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 06:04:48,338 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 06:04:48,338 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 06:04:48,339 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 06:04:48,339 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 06:04:48,339 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 06:04:48,340 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 06:04:48,340 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 06:04:48,341 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 06:04:48,341 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 06:04:48,342 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 06:04:48,342 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 06:04:48,342 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 06:04:48,343 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 06:04:48,343 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 06:04:48,343 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 06:04:48,344 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9bfc0bfd402f01a909df8198af653a6c40e8b771ded2d89ed782f9da2aa5bbb [2024-10-11 06:04:48,647 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 06:04:48,672 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 06:04:48,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 06:04:48,681 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 06:04:48,682 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 06:04:48,683 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.factorial4even.c [2024-10-11 06:04:50,282 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 06:04:50,511 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 06:04:50,512 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.factorial4even.c [2024-10-11 06:04:50,521 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/3dd77e37d/6fed880136d84ca794bfe556804bd2ea/FLAGcfe02963c [2024-10-11 06:04:50,897 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/3dd77e37d/6fed880136d84ca794bfe556804bd2ea [2024-10-11 06:04:50,900 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 06:04:50,902 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 06:04:50,903 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 06:04:50,903 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 06:04:50,909 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 06:04:50,910 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 06:04:50" (1/1) ... [2024-10-11 06:04:50,912 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e91ab0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:04:50, skipping insertion in model container [2024-10-11 06:04:50,912 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 06:04:50" (1/1) ... [2024-10-11 06:04:50,938 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 06:04:51,119 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/hardware-verification-bv/btor2c-lazyMod.factorial4even.c[1439,1452] [2024-10-11 06:04:51,165 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 06:04:51,177 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 06:04:51,190 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/hardware-verification-bv/btor2c-lazyMod.factorial4even.c[1439,1452] [2024-10-11 06:04:51,211 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 06:04:51,231 INFO L204 MainTranslator]: Completed translation [2024-10-11 06:04:51,231 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:04:51 WrapperNode [2024-10-11 06:04:51,232 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 06:04:51,233 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 06:04:51,233 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 06:04:51,233 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 06:04:51,242 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:04:51" (1/1) ... [2024-10-11 06:04:51,250 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:04:51" (1/1) ... [2024-10-11 06:04:51,288 INFO L138 Inliner]: procedures = 17, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 98 [2024-10-11 06:04:51,289 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 06:04:51,290 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 06:04:51,290 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 06:04:51,291 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 06:04:51,303 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:04:51" (1/1) ... [2024-10-11 06:04:51,303 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:04:51" (1/1) ... [2024-10-11 06:04:51,307 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:04:51" (1/1) ... [2024-10-11 06:04:51,330 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-11 06:04:51,331 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:04:51" (1/1) ... [2024-10-11 06:04:51,331 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:04:51" (1/1) ... [2024-10-11 06:04:51,339 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:04:51" (1/1) ... [2024-10-11 06:04:51,343 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:04:51" (1/1) ... [2024-10-11 06:04:51,346 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:04:51" (1/1) ... [2024-10-11 06:04:51,347 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:04:51" (1/1) ... [2024-10-11 06:04:51,351 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 06:04:51,352 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 06:04:51,353 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 06:04:51,353 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 06:04:51,357 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:04:51" (1/1) ... [2024-10-11 06:04:51,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 06:04:51,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 06:04:51,406 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 06:04:51,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 06:04:51,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 06:04:51,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 06:04:51,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 06:04:51,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 06:04:51,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-11 06:04:51,467 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-11 06:04:51,563 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 06:04:51,569 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 06:04:51,918 INFO L? ?]: Removed 41 outVars from TransFormulas that were not future-live. [2024-10-11 06:04:51,919 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 06:04:51,949 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 06:04:51,950 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-11 06:04:51,950 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 06:04:51 BoogieIcfgContainer [2024-10-11 06:04:51,950 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 06:04:51,953 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 06:04:51,954 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 06:04:51,958 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 06:04:51,959 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 06:04:50" (1/3) ... [2024-10-11 06:04:51,960 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@790c174a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 06:04:51, skipping insertion in model container [2024-10-11 06:04:51,960 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:04:51" (2/3) ... [2024-10-11 06:04:51,961 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@790c174a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 06:04:51, skipping insertion in model container [2024-10-11 06:04:51,961 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 06:04:51" (3/3) ... [2024-10-11 06:04:51,963 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.factorial4even.c [2024-10-11 06:04:51,982 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 06:04:51,982 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 06:04:52,044 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 06:04:52,051 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;@75e09777, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 06:04:52,052 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-11 06:04:52,059 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 29 states have internal predecessors, (41), 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) [2024-10-11 06:04:52,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-11 06:04:52,066 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 06:04:52,067 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 06:04:52,067 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 06:04:52,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 06:04:52,073 INFO L85 PathProgramCache]: Analyzing trace with hash -26206782, now seen corresponding path program 1 times [2024-10-11 06:04:52,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 06:04:52,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871899264] [2024-10-11 06:04:52,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 06:04:52,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 06:04:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:04:52,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 06:04:52,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 06:04:52,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871899264] [2024-10-11 06:04:52,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871899264] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 06:04:52,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 06:04:52,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 06:04:53,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142011176] [2024-10-11 06:04:53,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 06:04:53,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 06:04:53,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 06:04:53,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 06:04:53,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-11 06:04:53,039 INFO L87 Difference]: Start difference. First operand has 33 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 29 states have internal predecessors, (41), 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 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 06:04:53,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 06:04:53,357 INFO L93 Difference]: Finished difference Result 77 states and 111 transitions. [2024-10-11 06:04:53,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 06:04:53,359 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-11 06:04:53,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 06:04:53,366 INFO L225 Difference]: With dead ends: 77 [2024-10-11 06:04:53,366 INFO L226 Difference]: Without dead ends: 53 [2024-10-11 06:04:53,372 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-10-11 06:04:53,378 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 94 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 06:04:53,382 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 104 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 06:04:53,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-11 06:04:53,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2024-10-11 06:04:53,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.34375) internal successors, (43), 33 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 06:04:53,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2024-10-11 06:04:53,429 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 10 [2024-10-11 06:04:53,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 06:04:53,430 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2024-10-11 06:04:53,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 06:04:53,430 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2024-10-11 06:04:53,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-11 06:04:53,431 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 06:04:53,431 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 06:04:53,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 06:04:53,432 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 06:04:53,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 06:04:53,433 INFO L85 PathProgramCache]: Analyzing trace with hash -174461041, now seen corresponding path program 1 times [2024-10-11 06:04:53,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 06:04:53,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724808368] [2024-10-11 06:04:53,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 06:04:53,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 06:04:53,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:04:53,668 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 06:04:53,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:04:53,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 06:04:53,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 06:04:53,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724808368] [2024-10-11 06:04:53,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724808368] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 06:04:53,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 06:04:53,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 06:04:53,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805146790] [2024-10-11 06:04:53,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 06:04:53,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 06:04:53,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 06:04:53,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 06:04:53,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-11 06:04:53,681 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 06:04:53,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 06:04:53,756 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2024-10-11 06:04:53,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 06:04:53,758 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-10-11 06:04:53,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 06:04:53,761 INFO L225 Difference]: With dead ends: 51 [2024-10-11 06:04:53,761 INFO L226 Difference]: Without dead ends: 49 [2024-10-11 06:04:53,762 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-11 06:04:53,764 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 06:04:53,764 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 195 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 06:04:53,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-11 06:04:53,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2024-10-11 06:04:53,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 38 states have internal predecessors, (47), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-11 06:04:53,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2024-10-11 06:04:53,782 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 20 [2024-10-11 06:04:53,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 06:04:53,783 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2024-10-11 06:04:53,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 06:04:53,784 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2024-10-11 06:04:53,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-11 06:04:53,785 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 06:04:53,785 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 06:04:53,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 06:04:53,786 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 06:04:53,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 06:04:53,787 INFO L85 PathProgramCache]: Analyzing trace with hash 486597822, now seen corresponding path program 1 times [2024-10-11 06:04:53,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 06:04:53,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146244486] [2024-10-11 06:04:53,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 06:04:53,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 06:04:53,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:04:53,919 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 06:04:53,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:04:53,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 06:04:53,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 06:04:53,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146244486] [2024-10-11 06:04:53,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146244486] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 06:04:53,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 06:04:53,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 06:04:53,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861824558] [2024-10-11 06:04:53,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 06:04:53,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 06:04:53,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 06:04:53,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 06:04:53,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 06:04:53,936 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 06:04:53,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 06:04:53,976 INFO L93 Difference]: Finished difference Result 75 states and 94 transitions. [2024-10-11 06:04:53,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 06:04:53,977 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2024-10-11 06:04:53,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 06:04:53,978 INFO L225 Difference]: With dead ends: 75 [2024-10-11 06:04:53,978 INFO L226 Difference]: Without dead ends: 46 [2024-10-11 06:04:53,980 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 06:04:53,981 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 06:04:53,982 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 112 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 06:04:53,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-11 06:04:53,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-10-11 06:04:53,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 40 states have internal predecessors, (49), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-11 06:04:53,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2024-10-11 06:04:53,995 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 21 [2024-10-11 06:04:53,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 06:04:53,995 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2024-10-11 06:04:53,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 06:04:53,995 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2024-10-11 06:04:53,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-11 06:04:53,996 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 06:04:53,997 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 06:04:53,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 06:04:53,997 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 06:04:53,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 06:04:53,998 INFO L85 PathProgramCache]: Analyzing trace with hash -707771384, now seen corresponding path program 1 times [2024-10-11 06:04:53,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 06:04:53,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532751954] [2024-10-11 06:04:53,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 06:04:53,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 06:04:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:04:54,339 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 06:04:54,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:04:54,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 06:04:54,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 06:04:54,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532751954] [2024-10-11 06:04:54,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532751954] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 06:04:54,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 06:04:54,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 06:04:54,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301227108] [2024-10-11 06:04:54,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 06:04:54,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 06:04:54,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 06:04:54,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 06:04:54,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-11 06:04:54,354 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 06:04:54,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 06:04:54,456 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2024-10-11 06:04:54,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 06:04:54,457 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-10-11 06:04:54,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 06:04:54,458 INFO L225 Difference]: With dead ends: 88 [2024-10-11 06:04:54,459 INFO L226 Difference]: Without dead ends: 57 [2024-10-11 06:04:54,459 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-10-11 06:04:54,461 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 54 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 06:04:54,461 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 142 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 06:04:54,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-10-11 06:04:54,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2024-10-11 06:04:54,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.275) internal successors, (51), 41 states have internal predecessors, (51), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-11 06:04:54,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2024-10-11 06:04:54,470 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 22 [2024-10-11 06:04:54,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 06:04:54,471 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2024-10-11 06:04:54,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 06:04:54,471 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2024-10-11 06:04:54,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-11 06:04:54,472 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 06:04:54,472 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 06:04:54,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 06:04:54,472 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 06:04:54,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 06:04:54,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1398715840, now seen corresponding path program 1 times [2024-10-11 06:04:54,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 06:04:54,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391008396] [2024-10-11 06:04:54,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 06:04:54,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 06:04:54,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:04:54,750 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 06:04:54,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:04:54,760 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 06:04:54,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:04:54,770 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 06:04:54,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 06:04:54,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391008396] [2024-10-11 06:04:54,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391008396] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 06:04:54,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 06:04:54,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 06:04:54,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185340265] [2024-10-11 06:04:54,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 06:04:54,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 06:04:54,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 06:04:54,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 06:04:54,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 06:04:54,776 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 06:04:54,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 06:04:54,904 INFO L93 Difference]: Finished difference Result 88 states and 109 transitions. [2024-10-11 06:04:54,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 06:04:54,905 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2024-10-11 06:04:54,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 06:04:54,906 INFO L225 Difference]: With dead ends: 88 [2024-10-11 06:04:54,906 INFO L226 Difference]: Without dead ends: 57 [2024-10-11 06:04:54,906 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-11 06:04:54,907 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 42 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 06:04:54,907 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 62 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 06:04:54,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-10-11 06:04:54,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2024-10-11 06:04:54,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 46 states have internal predecessors, (56), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-11 06:04:54,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2024-10-11 06:04:54,925 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 29 [2024-10-11 06:04:54,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 06:04:54,925 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2024-10-11 06:04:54,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 06:04:54,926 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2024-10-11 06:04:54,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-11 06:04:54,926 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 06:04:54,927 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 06:04:54,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 06:04:54,927 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 06:04:54,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 06:04:54,929 INFO L85 PathProgramCache]: Analyzing trace with hash -187372260, now seen corresponding path program 1 times [2024-10-11 06:04:54,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 06:04:54,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245671985] [2024-10-11 06:04:54,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 06:04:54,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 06:04:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:04:55,125 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 06:04:55,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:04:55,133 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 06:04:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:04:55,139 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 06:04:55,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 06:04:55,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245671985] [2024-10-11 06:04:55,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245671985] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 06:04:55,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 06:04:55,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 06:04:55,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952206872] [2024-10-11 06:04:55,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 06:04:55,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 06:04:55,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 06:04:55,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 06:04:55,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 06:04:55,145 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 06:04:55,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 06:04:55,252 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2024-10-11 06:04:55,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 06:04:55,256 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2024-10-11 06:04:55,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 06:04:55,257 INFO L225 Difference]: With dead ends: 88 [2024-10-11 06:04:55,257 INFO L226 Difference]: Without dead ends: 57 [2024-10-11 06:04:55,258 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-11 06:04:55,259 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 39 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 06:04:55,260 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 62 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 06:04:55,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-10-11 06:04:55,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2024-10-11 06:04:55,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 47 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-11 06:04:55,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2024-10-11 06:04:55,269 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 30 [2024-10-11 06:04:55,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 06:04:55,269 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2024-10-11 06:04:55,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 06:04:55,270 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2024-10-11 06:04:55,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-11 06:04:55,271 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 06:04:55,272 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 06:04:55,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 06:04:55,272 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 06:04:55,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 06:04:55,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1372084099, now seen corresponding path program 1 times [2024-10-11 06:04:55,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 06:04:55,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951109096] [2024-10-11 06:04:55,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 06:04:55,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 06:04:55,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:04:55,822 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 06:04:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:04:55,830 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 06:04:55,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:04:55,838 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 06:04:55,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 06:04:55,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951109096] [2024-10-11 06:04:55,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951109096] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 06:04:55,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592207343] [2024-10-11 06:04:55,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 06:04:55,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 06:04:55,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 06:04:55,841 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 06:04:55,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 06:04:55,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:04:55,954 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-10-11 06:04:55,964 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 06:04:56,457 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 06:04:56,458 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 06:04:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 06:04:57,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592207343] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 06:04:57,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 06:04:57,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 28 [2024-10-11 06:04:57,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448198732] [2024-10-11 06:04:57,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 06:04:57,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-11 06:04:57,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 06:04:57,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-11 06:04:57,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2024-10-11 06:04:57,245 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 28 states, 25 states have (on average 2.08) internal successors, (52), 26 states have internal predecessors, (52), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-11 06:04:58,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 06:04:58,103 INFO L93 Difference]: Finished difference Result 137 states and 174 transitions. [2024-10-11 06:04:58,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-11 06:04:58,104 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.08) internal successors, (52), 26 states have internal predecessors, (52), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 31 [2024-10-11 06:04:58,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 06:04:58,106 INFO L225 Difference]: With dead ends: 137 [2024-10-11 06:04:58,106 INFO L226 Difference]: Without dead ends: 106 [2024-10-11 06:04:58,108 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=360, Invalid=1532, Unknown=0, NotChecked=0, Total=1892 [2024-10-11 06:04:58,109 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 293 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 06:04:58,110 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 233 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 06:04:58,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-10-11 06:04:58,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2024-10-11 06:04:58,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 73 states have internal predecessors, (86), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-11 06:04:58,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2024-10-11 06:04:58,133 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 31 [2024-10-11 06:04:58,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 06:04:58,134 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2024-10-11 06:04:58,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.08) internal successors, (52), 26 states have internal predecessors, (52), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-11 06:04:58,135 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2024-10-11 06:04:58,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-11 06:04:58,139 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 06:04:58,139 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 06:04:58,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 06:04:58,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 06:04:58,340 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 06:04:58,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 06:04:58,341 INFO L85 PathProgramCache]: Analyzing trace with hash -496835511, now seen corresponding path program 1 times [2024-10-11 06:04:58,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 06:04:58,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53010921] [2024-10-11 06:04:58,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 06:04:58,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 06:04:58,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:04:58,837 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 06:04:58,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:04:58,846 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 06:04:58,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:04:58,854 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-11 06:04:58,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:04:58,865 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-11 06:04:58,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 06:04:58,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53010921] [2024-10-11 06:04:58,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53010921] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 06:04:58,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873826727] [2024-10-11 06:04:58,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 06:04:58,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 06:04:58,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 06:04:58,869 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 06:04:58,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 06:04:59,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:04:59,005 WARN L253 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 88 conjuncts are in the unsatisfiable core [2024-10-11 06:04:59,031 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 06:04:59,625 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 06:04:59,625 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 06:05:01,647 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 06:05:01,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873826727] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 06:05:01,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 06:05:01,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 18] total 37 [2024-10-11 06:05:01,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299570590] [2024-10-11 06:05:01,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 06:05:01,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-10-11 06:05:01,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 06:05:01,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-10-11 06:05:01,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2024-10-11 06:05:01,653 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand has 37 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 35 states have internal predecessors, (81), 10 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-10-11 06:05:03,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 06:05:03,399 INFO L93 Difference]: Finished difference Result 155 states and 191 transitions. [2024-10-11 06:05:03,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-10-11 06:05:03,400 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 35 states have internal predecessors, (81), 10 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 43 [2024-10-11 06:05:03,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 06:05:03,404 INFO L225 Difference]: With dead ends: 155 [2024-10-11 06:05:03,405 INFO L226 Difference]: Without dead ends: 96 [2024-10-11 06:05:03,408 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=717, Invalid=3443, Unknown=0, NotChecked=0, Total=4160 [2024-10-11 06:05:03,410 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 244 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-11 06:05:03,411 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 119 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-11 06:05:03,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-10-11 06:05:03,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2024-10-11 06:05:03,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 67 states have (on average 1.1791044776119404) internal successors, (79), 69 states have internal predecessors, (79), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-11 06:05:03,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2024-10-11 06:05:03,424 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 43 [2024-10-11 06:05:03,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 06:05:03,424 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2024-10-11 06:05:03,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 35 states have internal predecessors, (81), 10 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-10-11 06:05:03,425 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2024-10-11 06:05:03,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-10-11 06:05:03,426 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 06:05:03,426 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 06:05:03,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 06:05:03,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 06:05:03,631 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 06:05:03,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 06:05:03,632 INFO L85 PathProgramCache]: Analyzing trace with hash 636530620, now seen corresponding path program 1 times [2024-10-11 06:05:03,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 06:05:03,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820126443] [2024-10-11 06:05:03,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 06:05:03,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 06:05:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:05:04,609 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 06:05:04,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:05:04,618 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 06:05:04,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:05:04,624 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-11 06:05:04,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:05:04,635 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-11 06:05:04,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:05:04,641 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-10-11 06:05:04,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:05:04,649 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-10-11 06:05:04,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:05:04,656 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 35 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-11 06:05:04,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 06:05:04,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820126443] [2024-10-11 06:05:04,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820126443] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 06:05:04,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897209731] [2024-10-11 06:05:04,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 06:05:04,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 06:05:04,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 06:05:04,660 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 06:05:04,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 06:05:04,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:05:04,822 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 121 conjuncts are in the unsatisfiable core [2024-10-11 06:05:04,829 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 06:05:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 23 proven. 56 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-11 06:05:06,264 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 06:05:13,436 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 18 proven. 61 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-11 06:05:13,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897209731] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 06:05:13,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 06:05:13,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 24] total 50 [2024-10-11 06:05:13,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869742486] [2024-10-11 06:05:13,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 06:05:13,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-10-11 06:05:13,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 06:05:13,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-10-11 06:05:13,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=2069, Unknown=0, NotChecked=0, Total=2450 [2024-10-11 06:05:13,444 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand has 50 states, 45 states have (on average 2.7555555555555555) internal successors, (124), 48 states have internal predecessors, (124), 17 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 13 states have call predecessors, (18), 15 states have call successors, (18) [2024-10-11 06:05:15,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 06:05:15,525 INFO L93 Difference]: Finished difference Result 193 states and 241 transitions. [2024-10-11 06:05:15,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-10-11 06:05:15,525 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 45 states have (on average 2.7555555555555555) internal successors, (124), 48 states have internal predecessors, (124), 17 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 13 states have call predecessors, (18), 15 states have call successors, (18) Word has length 72 [2024-10-11 06:05:15,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 06:05:15,527 INFO L225 Difference]: With dead ends: 193 [2024-10-11 06:05:15,527 INFO L226 Difference]: Without dead ends: 137 [2024-10-11 06:05:15,529 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1857 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=961, Invalid=4739, Unknown=0, NotChecked=0, Total=5700 [2024-10-11 06:05:15,530 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 360 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-11 06:05:15,530 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 289 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-11 06:05:15,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-10-11 06:05:15,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 132. [2024-10-11 06:05:15,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 111 states have (on average 1.1891891891891893) internal successors, (132), 114 states have internal predecessors, (132), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2024-10-11 06:05:15,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 164 transitions. [2024-10-11 06:05:15,547 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 164 transitions. Word has length 72 [2024-10-11 06:05:15,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 06:05:15,547 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 164 transitions. [2024-10-11 06:05:15,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 45 states have (on average 2.7555555555555555) internal successors, (124), 48 states have internal predecessors, (124), 17 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 13 states have call predecessors, (18), 15 states have call successors, (18) [2024-10-11 06:05:15,548 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 164 transitions. [2024-10-11 06:05:15,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-10-11 06:05:15,549 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 06:05:15,549 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 06:05:15,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-11 06:05:15,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 06:05:15,750 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 06:05:15,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 06:05:15,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1143269603, now seen corresponding path program 2 times [2024-10-11 06:05:15,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 06:05:15,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589763188] [2024-10-11 06:05:15,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 06:05:15,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 06:05:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:05:17,044 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 06:05:17,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:05:17,053 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 06:05:17,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:05:17,058 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-11 06:05:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:05:17,064 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-11 06:05:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:05:17,070 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-10-11 06:05:17,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:05:17,075 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-10-11 06:05:17,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 06:05:17,080 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-11 06:05:17,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 06:05:17,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589763188] [2024-10-11 06:05:17,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589763188] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 06:05:17,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229041308] [2024-10-11 06:05:17,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 06:05:17,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 06:05:17,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 06:05:17,084 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 06:05:17,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 06:05:17,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 06:05:17,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 06:05:17,231 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-10-11 06:05:17,242 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 06:05:18,841 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 06:05:18,841 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 06:05:41,113 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 06:05:41,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229041308] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 06:05:41,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 06:05:41,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23, 26] total 55 [2024-10-11 06:05:41,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779004808] [2024-10-11 06:05:41,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 06:05:41,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-10-11 06:05:41,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 06:05:41,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-10-11 06:05:41,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=2608, Unknown=0, NotChecked=0, Total=2970 [2024-10-11 06:05:41,117 INFO L87 Difference]: Start difference. First operand 132 states and 164 transitions. Second operand has 55 states, 50 states have (on average 2.42) internal successors, (121), 53 states have internal predecessors, (121), 14 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16) [2024-10-11 06:05:47,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 06:05:47,526 INFO L93 Difference]: Finished difference Result 191 states and 241 transitions. [2024-10-11 06:05:47,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-10-11 06:05:47,527 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 50 states have (on average 2.42) internal successors, (121), 53 states have internal predecessors, (121), 14 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16) Word has length 73 [2024-10-11 06:05:47,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 06:05:47,529 INFO L225 Difference]: With dead ends: 191 [2024-10-11 06:05:47,529 INFO L226 Difference]: Without dead ends: 189 [2024-10-11 06:05:47,530 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2020 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=1026, Invalid=5136, Unknown=0, NotChecked=0, Total=6162 [2024-10-11 06:05:47,531 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 541 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-10-11 06:05:47,531 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 538 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-10-11 06:05:47,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2024-10-11 06:05:47,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 185. [2024-10-11 06:05:47,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 156 states have (on average 1.2115384615384615) internal successors, (189), 161 states have internal predecessors, (189), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (23), 18 states have call predecessors, (23), 23 states have call successors, (23) [2024-10-11 06:05:47,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 235 transitions. [2024-10-11 06:05:47,552 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 235 transitions. Word has length 73 [2024-10-11 06:05:47,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 06:05:47,552 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 235 transitions. [2024-10-11 06:05:47,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 50 states have (on average 2.42) internal successors, (121), 53 states have internal predecessors, (121), 14 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16) [2024-10-11 06:05:47,553 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 235 transitions. [2024-10-11 06:05:47,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-10-11 06:05:47,554 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 06:05:47,554 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 06:05:47,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 06:05:47,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 06:05:47,759 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 06:05:47,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 06:05:47,759 INFO L85 PathProgramCache]: Analyzing trace with hash -762288727, now seen corresponding path program 2 times [2024-10-11 06:05:47,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 06:05:47,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185114339] [2024-10-11 06:05:47,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 06:05:47,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 06:05:47,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 06:05:47,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [489294982] [2024-10-11 06:05:47,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 06:05:47,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 06:05:47,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 06:05:47,851 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 06:05:47,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 06:05:48,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 06:05:48,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 06:05:48,218 INFO L255 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 127 conjuncts are in the unsatisfiable core [2024-10-11 06:05:48,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 06:05:51,285 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 38 proven. 57 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-10-11 06:05:51,285 INFO L311 TraceCheckSpWp]: Computing backward predicates...