./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound10.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound10.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7cd88f875a58f4eeda0acf74fa673f6c9452a00f17e8b4a3e93b35765440e39d --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 18:48:56,638 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 18:48:56,693 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 18:48:56,698 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 18:48:56,700 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 18:48:56,724 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 18:48:56,724 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 18:48:56,725 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 18:48:56,725 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 18:48:56,725 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 18:48:56,726 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 18:48:56,726 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 18:48:56,726 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 18:48:56,727 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 18:48:56,727 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 18:48:56,727 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 18:48:56,727 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 18:48:56,728 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 18:48:56,728 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 18:48:56,728 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 18:48:56,728 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 18:48:56,729 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 18:48:56,730 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 18:48:56,730 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 18:48:56,730 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 18:48:56,730 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 18:48:56,730 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 18:48:56,730 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 18:48:56,731 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 18:48:56,731 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 18:48:56,731 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 18:48:56,731 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 18:48:56,731 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 18:48:56,732 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 18:48:56,732 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 18:48:56,732 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 18:48:56,732 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 18:48:56,732 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 18:48:56,733 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 18:48:56,733 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 18:48:56,739 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 18:48:56,740 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 18:48:56,740 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7cd88f875a58f4eeda0acf74fa673f6c9452a00f17e8b4a3e93b35765440e39d [2024-10-12 18:48:56,955 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 18:48:56,981 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 18:48:56,983 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 18:48:56,984 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 18:48:56,985 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 18:48:56,986 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound10.i [2024-10-12 18:48:58,286 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 18:48:58,446 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 18:48:58,447 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound10.i [2024-10-12 18:48:58,453 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86b5d8988/9eff7d685a6e4626b06a30b01047d2f4/FLAG35cdfd209 [2024-10-12 18:48:58,853 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86b5d8988/9eff7d685a6e4626b06a30b01047d2f4 [2024-10-12 18:48:58,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 18:48:58,858 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 18:48:58,859 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 18:48:58,860 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 18:48:58,865 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 18:48:58,866 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:48:58" (1/1) ... [2024-10-12 18:48:58,867 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@221ef807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:48:58, skipping insertion in model container [2024-10-12 18:48:58,867 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:48:58" (1/1) ... [2024-10-12 18:48:58,886 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 18:48:59,051 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/nla-digbench-scaling/divbin_valuebound10.i[950,963] [2024-10-12 18:48:59,071 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 18:48:59,082 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 18:48:59,095 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/nla-digbench-scaling/divbin_valuebound10.i[950,963] [2024-10-12 18:48:59,102 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 18:48:59,116 INFO L204 MainTranslator]: Completed translation [2024-10-12 18:48:59,117 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:48:59 WrapperNode [2024-10-12 18:48:59,117 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 18:48:59,118 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 18:48:59,119 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 18:48:59,119 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 18:48:59,126 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:48:59" (1/1) ... [2024-10-12 18:48:59,131 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:48:59" (1/1) ... [2024-10-12 18:48:59,145 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 48 [2024-10-12 18:48:59,146 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 18:48:59,147 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 18:48:59,148 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 18:48:59,148 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 18:48:59,156 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:48:59" (1/1) ... [2024-10-12 18:48:59,156 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:48:59" (1/1) ... [2024-10-12 18:48:59,157 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:48:59" (1/1) ... [2024-10-12 18:48:59,186 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]. [2024-10-12 18:48:59,187 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:48:59" (1/1) ... [2024-10-12 18:48:59,187 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:48:59" (1/1) ... [2024-10-12 18:48:59,203 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:48:59" (1/1) ... [2024-10-12 18:48:59,206 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:48:59" (1/1) ... [2024-10-12 18:48:59,207 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:48:59" (1/1) ... [2024-10-12 18:48:59,211 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:48:59" (1/1) ... [2024-10-12 18:48:59,214 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 18:48:59,215 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 18:48:59,215 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 18:48:59,215 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 18:48:59,216 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:48:59" (1/1) ... [2024-10-12 18:48:59,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 18:48:59,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:48:59,247 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-12 18:48:59,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-12 18:48:59,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 18:48:59,287 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-12 18:48:59,288 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-12 18:48:59,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 18:48:59,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 18:48:59,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 18:48:59,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-12 18:48:59,288 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-12 18:48:59,343 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 18:48:59,347 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 18:48:59,497 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-10-12 18:48:59,497 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 18:48:59,517 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 18:48:59,517 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-12 18:48:59,518 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:48:59 BoogieIcfgContainer [2024-10-12 18:48:59,518 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 18:48:59,519 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 18:48:59,519 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 18:48:59,524 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 18:48:59,524 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 06:48:58" (1/3) ... [2024-10-12 18:48:59,525 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fec860a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:48:59, skipping insertion in model container [2024-10-12 18:48:59,525 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:48:59" (2/3) ... [2024-10-12 18:48:59,525 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fec860a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:48:59, skipping insertion in model container [2024-10-12 18:48:59,525 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:48:59" (3/3) ... [2024-10-12 18:48:59,526 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_valuebound10.i [2024-10-12 18:48:59,540 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 18:48:59,540 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 18:48:59,588 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 18:48:59,594 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;@3cf5c4cf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 18:48:59,594 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 18:48:59,597 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-12 18:48:59,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-12 18:48:59,603 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:48:59,604 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:48:59,604 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:48:59,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:48:59,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1335240993, now seen corresponding path program 1 times [2024-10-12 18:48:59,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:48:59,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546244179] [2024-10-12 18:48:59,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:48:59,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:48:59,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:48:59,748 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:48:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:48:59,760 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 18:48:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:48:59,768 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-12 18:48:59,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:48:59,776 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-12 18:48:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:48:59,785 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-12 18:48:59,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:48:59,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546244179] [2024-10-12 18:48:59,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546244179] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:48:59,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:48:59,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 18:48:59,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8630533] [2024-10-12 18:48:59,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:48:59,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-12 18:48:59,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:48:59,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-12 18:48:59,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 18:48:59,823 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-12 18:48:59,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:48:59,841 INFO L93 Difference]: Finished difference Result 50 states and 79 transitions. [2024-10-12 18:48:59,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-12 18:48:59,843 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2024-10-12 18:48:59,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:48:59,848 INFO L225 Difference]: With dead ends: 50 [2024-10-12 18:48:59,848 INFO L226 Difference]: Without dead ends: 24 [2024-10-12 18:48:59,851 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 18:48:59,853 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:48:59,854 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:48:59,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-10-12 18:48:59,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-10-12 18:48:59,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-12 18:48:59,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2024-10-12 18:48:59,881 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 29 [2024-10-12 18:48:59,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:48:59,882 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-10-12 18:48:59,883 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-12 18:48:59,883 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2024-10-12 18:48:59,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-12 18:48:59,884 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:48:59,885 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:48:59,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 18:48:59,885 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:48:59,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:48:59,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1249624970, now seen corresponding path program 1 times [2024-10-12 18:48:59,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:48:59,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091581929] [2024-10-12 18:48:59,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:48:59,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:48:59,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:48:59,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [382186805] [2024-10-12 18:48:59,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:48:59,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:48:59,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:48:59,949 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:48:59,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 18:49:00,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:49:00,017 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-12 18:49:00,025 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:49:00,339 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 18:49:00,339 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:49:00,670 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-12 18:49:00,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:49:00,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091581929] [2024-10-12 18:49:00,672 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:49:00,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382186805] [2024-10-12 18:49:00,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382186805] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-12 18:49:00,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 18:49:00,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2024-10-12 18:49:00,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199453456] [2024-10-12 18:49:00,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:49:00,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-12 18:49:00,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:49:00,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-12 18:49:00,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-10-12 18:49:00,677 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-12 18:49:00,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:49:00,890 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2024-10-12 18:49:00,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 18:49:00,891 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2024-10-12 18:49:00,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:49:00,892 INFO L225 Difference]: With dead ends: 36 [2024-10-12 18:49:00,892 INFO L226 Difference]: Without dead ends: 33 [2024-10-12 18:49:00,892 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-10-12 18:49:00,893 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 18:49:00,894 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 84 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 18:49:00,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-10-12 18:49:00,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-10-12 18:49:00,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-12 18:49:00,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-10-12 18:49:00,904 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 30 [2024-10-12 18:49:00,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:49:00,905 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-10-12 18:49:00,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-12 18:49:00,906 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-10-12 18:49:00,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-12 18:49:00,907 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:49:00,907 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:49:00,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-12 18:49:01,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:49:01,112 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:49:01,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:49:01,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1303469435, now seen corresponding path program 1 times [2024-10-12 18:49:01,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:49:01,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255207907] [2024-10-12 18:49:01,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:49:01,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:49:01,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:49:01,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [853982173] [2024-10-12 18:49:01,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:49:01,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:49:01,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:49:01,155 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:49:01,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 18:49:01,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:49:01,199 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-12 18:49:01,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:49:01,339 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-12 18:49:01,340 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:49:01,428 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-10-12 18:49:01,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:49:01,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255207907] [2024-10-12 18:49:01,429 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:49:01,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853982173] [2024-10-12 18:49:01,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853982173] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-12 18:49:01,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 18:49:01,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2024-10-12 18:49:01,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698884751] [2024-10-12 18:49:01,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:49:01,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 18:49:01,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:49:01,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 18:49:01,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-12 18:49:01,432 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-12 18:49:05,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-10-12 18:49:06,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:49:06,247 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2024-10-12 18:49:06,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 18:49:06,248 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2024-10-12 18:49:06,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:49:06,249 INFO L225 Difference]: With dead ends: 43 [2024-10-12 18:49:06,249 INFO L226 Difference]: Without dead ends: 40 [2024-10-12 18:49:06,249 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-12 18:49:06,250 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 4 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-10-12 18:49:06,250 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 87 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2024-10-12 18:49:06,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-10-12 18:49:06,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2024-10-12 18:49:06,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-12 18:49:06,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2024-10-12 18:49:06,256 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 32 [2024-10-12 18:49:06,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:49:06,256 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2024-10-12 18:49:06,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-12 18:49:06,256 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2024-10-12 18:49:06,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-12 18:49:06,257 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:49:06,257 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:49:06,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-12 18:49:06,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-10-12 18:49:06,462 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:49:06,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:49:06,462 INFO L85 PathProgramCache]: Analyzing trace with hash -158878427, now seen corresponding path program 1 times [2024-10-12 18:49:06,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:49:06,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414217216] [2024-10-12 18:49:06,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:49:06,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:49:06,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:49:06,856 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:49:06,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:49:06,861 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 18:49:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:49:06,866 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-12 18:49:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:49:06,871 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-12 18:49:06,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:49:06,875 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-12 18:49:06,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:49:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-12 18:49:06,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:49:06,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414217216] [2024-10-12 18:49:06,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414217216] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:49:06,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:49:06,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-12 18:49:06,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132622266] [2024-10-12 18:49:06,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:49:06,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-12 18:49:06,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:49:06,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-12 18:49:06,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-12 18:49:06,890 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-12 18:49:06,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:49:06,941 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2024-10-12 18:49:06,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 18:49:06,942 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), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2024-10-12 18:49:06,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:49:06,943 INFO L225 Difference]: With dead ends: 47 [2024-10-12 18:49:06,943 INFO L226 Difference]: Without dead ends: 33 [2024-10-12 18:49:06,943 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-12 18:49:06,944 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:49:06,944 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 69 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:49:06,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-10-12 18:49:06,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-10-12 18:49:06,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-12 18:49:06,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2024-10-12 18:49:06,954 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 38 [2024-10-12 18:49:06,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:49:06,954 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2024-10-12 18:49:06,954 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), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-12 18:49:06,955 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2024-10-12 18:49:06,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-12 18:49:06,965 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:49:06,965 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:49:06,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-12 18:49:06,965 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:49:06,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:49:06,966 INFO L85 PathProgramCache]: Analyzing trace with hash 599091488, now seen corresponding path program 1 times [2024-10-12 18:49:06,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:49:06,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910576582] [2024-10-12 18:49:06,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:49:06,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:49:07,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:49:07,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1167730240] [2024-10-12 18:49:07,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:49:07,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:49:07,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:49:07,009 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:49:07,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 18:49:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:49:07,102 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-12 18:49:07,105 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:49:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-12 18:49:07,298 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:49:20,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:49:20,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910576582] [2024-10-12 18:49:20,171 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:49:20,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167730240] [2024-10-12 18:49:20,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167730240] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:49:20,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-12 18:49:20,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-10-12 18:49:20,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214704363] [2024-10-12 18:49:20,172 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-12 18:49:20,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-12 18:49:20,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:49:20,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-12 18:49:20,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=171, Unknown=3, NotChecked=0, Total=210 [2024-10-12 18:49:20,173 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-12 18:49:20,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:49:20,367 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2024-10-12 18:49:20,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-12 18:49:20,368 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2024-10-12 18:49:20,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:49:20,369 INFO L225 Difference]: With dead ends: 48 [2024-10-12 18:49:20,369 INFO L226 Difference]: Without dead ends: 44 [2024-10-12 18:49:20,369 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=42, Invalid=195, Unknown=3, NotChecked=0, Total=240 [2024-10-12 18:49:20,370 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:49:20,370 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 124 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 18:49:20,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-12 18:49:20,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2024-10-12 18:49:20,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-12 18:49:20,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2024-10-12 18:49:20,382 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 40 [2024-10-12 18:49:20,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:49:20,384 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2024-10-12 18:49:20,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-12 18:49:20,384 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2024-10-12 18:49:20,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-12 18:49:20,385 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:49:20,385 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:49:20,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-12 18:49:20,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:49:20,589 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:49:20,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:49:20,589 INFO L85 PathProgramCache]: Analyzing trace with hash -2107284293, now seen corresponding path program 2 times [2024-10-12 18:49:20,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:49:20,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851879070] [2024-10-12 18:49:20,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:49:20,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:49:20,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:49:20,926 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:49:20,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:49:20,929 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 18:49:20,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:49:20,930 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-12 18:49:20,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:49:20,932 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-12 18:49:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:49:20,934 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-12 18:49:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:49:20,940 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-12 18:49:20,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:49:20,948 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-12 18:49:20,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:49:20,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851879070] [2024-10-12 18:49:20,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851879070] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:49:20,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067300871] [2024-10-12 18:49:20,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 18:49:20,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:49:20,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:49:20,954 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:49:20,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 18:49:21,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 18:49:21,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:49:21,056 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-12 18:49:21,058 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:49:21,486 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-12 18:49:21,487 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:49:22,276 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-12 18:49:22,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067300871] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:49:22,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:49:22,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 10] total 23 [2024-10-12 18:49:22,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144508131] [2024-10-12 18:49:22,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:49:22,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-12 18:49:22,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:49:22,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-12 18:49:22,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2024-10-12 18:49:22,278 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 20 states have internal predecessors, (47), 10 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (16), 10 states have call predecessors, (16), 9 states have call successors, (16) [2024-10-12 18:49:22,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:49:22,731 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2024-10-12 18:49:22,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-12 18:49:22,732 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 20 states have internal predecessors, (47), 10 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (16), 10 states have call predecessors, (16), 9 states have call successors, (16) Word has length 48 [2024-10-12 18:49:22,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:49:22,733 INFO L225 Difference]: With dead ends: 82 [2024-10-12 18:49:22,733 INFO L226 Difference]: Without dead ends: 50 [2024-10-12 18:49:22,734 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2024-10-12 18:49:22,734 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 55 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-12 18:49:22,735 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 165 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-12 18:49:22,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-10-12 18:49:22,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2024-10-12 18:49:22,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-12 18:49:22,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2024-10-12 18:49:22,751 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 48 [2024-10-12 18:49:22,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:49:22,752 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2024-10-12 18:49:22,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 20 states have internal predecessors, (47), 10 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (16), 10 states have call predecessors, (16), 9 states have call successors, (16) [2024-10-12 18:49:22,752 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2024-10-12 18:49:22,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-12 18:49:22,753 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:49:22,753 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:49:22,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-12 18:49:22,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:49:22,954 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:49:22,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:49:22,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1064658186, now seen corresponding path program 3 times [2024-10-12 18:49:22,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:49:22,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312763404] [2024-10-12 18:49:22,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:49:22,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:49:23,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:49:23,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1265617471] [2024-10-12 18:49:23,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 18:49:23,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:49:23,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:49:23,029 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:49:23,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-12 18:49:23,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-12 18:49:23,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:49:23,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-10-12 18:49:23,362 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:49:24,509 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-12 18:49:24,510 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:49:37,941 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-12 18:49:37,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:49:37,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312763404] [2024-10-12 18:49:37,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:49:37,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265617471] [2024-10-12 18:49:37,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265617471] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:49:37,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 18:49:37,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 25 [2024-10-12 18:49:37,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940101446] [2024-10-12 18:49:37,943 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 18:49:37,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-12 18:49:37,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:49:37,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-12 18:49:37,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=471, Unknown=1, NotChecked=0, Total=600 [2024-10-12 18:49:37,944 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 22 states have internal predecessors, (43), 9 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12)