./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_unwindbound50.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_unwindbound50.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 462bdab67ac93ddd789186f30bfdfc189629d2959c27ec219da5960b800d2042 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 18:48:53,078 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 18:48:53,145 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 18:48:53,149 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 18:48:53,150 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 18:48:53,169 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 18:48:53,170 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 18:48:53,170 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 18:48:53,171 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 18:48:53,171 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 18:48:53,172 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 18:48:53,172 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 18:48:53,173 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 18:48:53,173 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 18:48:53,174 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 18:48:53,174 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 18:48:53,175 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 18:48:53,175 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 18:48:53,175 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 18:48:53,178 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 18:48:53,178 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 18:48:53,179 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 18:48:53,179 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 18:48:53,179 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 18:48:53,180 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 18:48:53,180 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 18:48:53,180 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 18:48:53,180 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 18:48:53,181 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 18:48:53,181 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 18:48:53,181 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 18:48:53,181 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 18:48:53,182 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 18:48:53,182 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 18:48:53,184 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 18:48:53,184 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 18:48:53,184 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 18:48:53,184 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 18:48:53,185 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 18:48:53,185 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 18:48:53,185 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 18:48:53,185 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 18:48:53,186 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 462bdab67ac93ddd789186f30bfdfc189629d2959c27ec219da5960b800d2042 [2024-10-12 18:48:53,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 18:48:53,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 18:48:53,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 18:48:53,472 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 18:48:53,472 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 18:48:53,473 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i [2024-10-12 18:48:54,936 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 18:48:55,114 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 18:48:55,115 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i [2024-10-12 18:48:55,122 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a8fe7184/856f054508104cf69008ce1ada9e9bbc/FLAGd21652ee4 [2024-10-12 18:48:55,507 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a8fe7184/856f054508104cf69008ce1ada9e9bbc [2024-10-12 18:48:55,510 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 18:48:55,512 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 18:48:55,513 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 18:48:55,513 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 18:48:55,521 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 18:48:55,522 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:48:55" (1/1) ... [2024-10-12 18:48:55,523 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bb0b6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:48:55, skipping insertion in model container [2024-10-12 18:48:55,523 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:48:55" (1/1) ... [2024-10-12 18:48:55,550 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 18:48:55,725 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_unwindbound50.i[950,963] [2024-10-12 18:48:55,740 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 18:48:55,748 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 18:48:55,760 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_unwindbound50.i[950,963] [2024-10-12 18:48:55,765 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 18:48:55,780 INFO L204 MainTranslator]: Completed translation [2024-10-12 18:48:55,780 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:48:55 WrapperNode [2024-10-12 18:48:55,780 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 18:48:55,781 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 18:48:55,781 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 18:48:55,781 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 18:48:55,788 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:48:55" (1/1) ... [2024-10-12 18:48:55,794 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:48:55" (1/1) ... [2024-10-12 18:48:55,811 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2024-10-12 18:48:55,812 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 18:48:55,813 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 18:48:55,813 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 18:48:55,813 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 18:48:55,823 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:48:55" (1/1) ... [2024-10-12 18:48:55,823 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:48:55" (1/1) ... [2024-10-12 18:48:55,825 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:48:55" (1/1) ... [2024-10-12 18:48:55,836 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 18:48:55,836 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:48:55" (1/1) ... [2024-10-12 18:48:55,836 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:48:55" (1/1) ... [2024-10-12 18:48:55,843 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:48:55" (1/1) ... [2024-10-12 18:48:55,846 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:48:55" (1/1) ... [2024-10-12 18:48:55,850 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:48:55" (1/1) ... [2024-10-12 18:48:55,851 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:48:55" (1/1) ... [2024-10-12 18:48:55,853 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 18:48:55,853 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 18:48:55,854 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 18:48:55,854 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 18:48:55,855 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:48:55" (1/1) ... [2024-10-12 18:48:55,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 18:48:55,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:48:55,893 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 18:48:55,896 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 18:48:55,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 18:48:55,949 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-12 18:48:55,950 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-12 18:48:55,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 18:48:55,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 18:48:55,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 18:48:55,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-12 18:48:55,952 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-12 18:48:56,020 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 18:48:56,023 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 18:48:56,203 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-10-12 18:48:56,204 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 18:48:56,236 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 18:48:56,237 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-12 18:48:56,237 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:48:56 BoogieIcfgContainer [2024-10-12 18:48:56,237 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 18:48:56,242 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 18:48:56,243 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 18:48:56,246 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 18:48:56,247 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 06:48:55" (1/3) ... [2024-10-12 18:48:56,248 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3808807b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:48:56, skipping insertion in model container [2024-10-12 18:48:56,248 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:48:55" (2/3) ... [2024-10-12 18:48:56,249 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3808807b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:48:56, skipping insertion in model container [2024-10-12 18:48:56,249 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:48:56" (3/3) ... [2024-10-12 18:48:56,250 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound50.i [2024-10-12 18:48:56,268 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 18:48:56,268 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 18:48:56,335 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 18:48:56,343 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;@1d777272, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 18:48:56,343 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 18:48:56,348 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-12 18:48:56,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-12 18:48:56,355 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:48:56,356 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:48:56,356 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:48:56,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:48:56,363 INFO L85 PathProgramCache]: Analyzing trace with hash -627064806, now seen corresponding path program 1 times [2024-10-12 18:48:56,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:48:56,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430956324] [2024-10-12 18:48:56,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:48:56,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:48:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:48:56,540 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:48:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:48:56,554 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 18:48:56,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:48:56,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 18:48:56,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:48:56,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430956324] [2024-10-12 18:48:56,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430956324] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:48:56,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:48:56,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 18:48:56,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975896877] [2024-10-12 18:48:56,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:48:56,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-12 18:48:56,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:48:56,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-12 18:48:56,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 18:48:56,605 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-12 18:48:56,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:48:56,633 INFO L93 Difference]: Finished difference Result 48 states and 71 transitions. [2024-10-12 18:48:56,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-12 18:48:56,636 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-10-12 18:48:56,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:48:56,643 INFO L225 Difference]: With dead ends: 48 [2024-10-12 18:48:56,643 INFO L226 Difference]: Without dead ends: 23 [2024-10-12 18:48:56,646 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 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 18:48:56,650 INFO L432 NwaCegarLoop]: 29 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, 29 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 18:48:56,651 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:48:56,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-12 18:48:56,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-10-12 18:48:56,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 18:48:56,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2024-10-12 18:48:56,705 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 18 [2024-10-12 18:48:56,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:48:56,705 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2024-10-12 18:48:56,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-12 18:48:56,706 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2024-10-12 18:48:56,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-12 18:48:56,707 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:48:56,707 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:48:56,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 18:48:56,708 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:48:56,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:48:56,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1502675692, now seen corresponding path program 1 times [2024-10-12 18:48:56,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:48:56,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103628823] [2024-10-12 18:48:56,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:48:56,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:48:56,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:48:56,896 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:48:56,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:48:56,911 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 18:48:56,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:48:56,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 18:48:56,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:48:56,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103628823] [2024-10-12 18:48:56,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103628823] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:48:56,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:48:56,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-12 18:48:56,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740159440] [2024-10-12 18:48:56,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:48:56,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-12 18:48:56,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:48:56,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-12 18:48:56,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-12 18:48:56,939 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2024-10-12 18:48:56,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:48:56,981 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2024-10-12 18:48:56,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 18:48:56,982 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 20 [2024-10-12 18:48:56,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:48:56,984 INFO L225 Difference]: With dead ends: 37 [2024-10-12 18:48:56,985 INFO L226 Difference]: Without dead ends: 25 [2024-10-12 18:48:56,985 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 [2024-10-12 18:48:56,987 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:48:56,987 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 68 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:48:56,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-12 18:48:56,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-10-12 18:48:56,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 18:48:56,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2024-10-12 18:48:56,995 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 20 [2024-10-12 18:48:56,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:48:56,997 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2024-10-12 18:48:56,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2024-10-12 18:48:56,997 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2024-10-12 18:48:56,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-12 18:48:56,998 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:48:56,998 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:48:56,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-12 18:48:56,999 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:48:57,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:48:57,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1051975660, now seen corresponding path program 1 times [2024-10-12 18:48:57,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:48:57,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545806091] [2024-10-12 18:48:57,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:48:57,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:48:57,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:48:57,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512824554] [2024-10-12 18:48:57,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:48:57,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:48:57,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:48:57,065 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 18:48:57,066 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 18:48:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:48:57,141 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-12 18:48:57,151 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:48:57,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 18:48:57,292 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 18:48:57,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:48:57,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545806091] [2024-10-12 18:48:57,293 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:48:57,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512824554] [2024-10-12 18:48:57,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512824554] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:48:57,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:48:57,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 18:48:57,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933045435] [2024-10-12 18:48:57,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:48:57,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 18:48:57,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:48:57,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 18:48:57,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-12 18:48:57,301 INFO L87 Difference]: Start difference. First operand 25 states and 31 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, (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) [2024-10-12 18:48:57,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:48:57,392 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2024-10-12 18:48:57,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 18:48:57,393 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, (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 21 [2024-10-12 18:48:57,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:48:57,394 INFO L225 Difference]: With dead ends: 37 [2024-10-12 18:48:57,394 INFO L226 Difference]: Without dead ends: 34 [2024-10-12 18:48:57,395 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-12 18:48:57,396 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:48:57,397 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 75 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 18:48:57,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-10-12 18:48:57,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-10-12 18:48:57,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-12 18:48:57,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2024-10-12 18:48:57,405 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 21 [2024-10-12 18:48:57,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:48:57,405 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2024-10-12 18:48:57,406 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, (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) [2024-10-12 18:48:57,406 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2024-10-12 18:48:57,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-12 18:48:57,407 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:48:57,407 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:48:57,425 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 18:48:57,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:48:57,612 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:48:57,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:48:57,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1831455308, now seen corresponding path program 1 times [2024-10-12 18:48:57,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:48:57,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015720045] [2024-10-12 18:48:57,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:48:57,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:48:57,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:48:58,041 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:48:58,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:48:58,047 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 18:48:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:48:58,055 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-12 18:48:58,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:48:58,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 18:48:58,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:48:58,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015720045] [2024-10-12 18:48:58,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015720045] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:48:58,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:48:58,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-12 18:48:58,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638925369] [2024-10-12 18:48:58,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:48:58,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 18:48:58,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:48:58,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 18:48:58,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 18:48:58,074 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-12 18:48:58,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:48:58,107 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2024-10-12 18:48:58,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 18:48:58,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2024-10-12 18:48:58,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:48:58,108 INFO L225 Difference]: With dead ends: 60 [2024-10-12 18:48:58,108 INFO L226 Difference]: Without dead ends: 35 [2024-10-12 18:48:58,109 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 18:48:58,109 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:48:58,110 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:48:58,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-12 18:48:58,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-10-12 18:48:58,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-12 18:48:58,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2024-10-12 18:48:58,122 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 30 [2024-10-12 18:48:58,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:48:58,122 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2024-10-12 18:48:58,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-12 18:48:58,122 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2024-10-12 18:48:58,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-12 18:48:58,123 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:48:58,126 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:48:58,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-12 18:48:58,126 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:48:58,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:48:58,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1020028593, now seen corresponding path program 1 times [2024-10-12 18:48:58,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:48:58,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401900954] [2024-10-12 18:48:58,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:48:58,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:48:58,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:48:58,242 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:48:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:48:58,249 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 18:48:58,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:48:58,257 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-12 18:48:58,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:48:58,262 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-12 18:48:58,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:48:58,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401900954] [2024-10-12 18:48:58,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401900954] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:48:58,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661654248] [2024-10-12 18:48:58,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:48:58,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:48:58,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:48:58,267 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 18:48:58,271 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 18:48:58,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:48:58,323 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-12 18:48:58,325 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:48:58,393 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-12 18:48:58,393 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:48:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-12 18:48:58,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661654248] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:48:58,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:48:58,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 10 [2024-10-12 18:48:58,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562515117] [2024-10-12 18:48:58,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:48:58,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-12 18:48:58,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:48:58,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-12 18:48:58,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-12 18:48:58,474 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-12 18:48:58,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:48:58,548 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2024-10-12 18:48:58,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-12 18:48:58,549 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 32 [2024-10-12 18:48:58,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:48:58,550 INFO L225 Difference]: With dead ends: 75 [2024-10-12 18:48:58,550 INFO L226 Difference]: Without dead ends: 54 [2024-10-12 18:48:58,550 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-10-12 18:48:58,551 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 18 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:48:58,551 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 127 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:48:58,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-12 18:48:58,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2024-10-12 18:48:58,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 35 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-12 18:48:58,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2024-10-12 18:48:58,558 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 32 [2024-10-12 18:48:58,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:48:58,559 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2024-10-12 18:48:58,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-12 18:48:58,559 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2024-10-12 18:48:58,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-12 18:48:58,575 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:48:58,575 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:48:58,613 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 18:48:58,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:48:58,776 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:48:58,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:48:58,777 INFO L85 PathProgramCache]: Analyzing trace with hash -736358239, now seen corresponding path program 1 times [2024-10-12 18:48:58,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:48:58,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860569263] [2024-10-12 18:48:58,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:48:58,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:48:58,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:48:58,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2138179141] [2024-10-12 18:48:58,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:48:58,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:48:58,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:48:58,810 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 18:48:58,811 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 18:48:58,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:48:58,932 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-12 18:48:58,935 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:48:59,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 18:48:59,135 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:49:03,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:49:03,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860569263] [2024-10-12 18:49:03,634 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:49:03,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138179141] [2024-10-12 18:49:03,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138179141] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:49:03,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-12 18:49:03,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-10-12 18:49:03,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665077280] [2024-10-12 18:49:03,634 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-12 18:49:03,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-12 18:49:03,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:49:03,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-12 18:49:03,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2024-10-12 18:49:03,639 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-12 18:49:03,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:49:03,767 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2024-10-12 18:49:03,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-12 18:49:03,767 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2024-10-12 18:49:03,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:49:03,768 INFO L225 Difference]: With dead ends: 54 [2024-10-12 18:49:03,769 INFO L226 Difference]: Without dead ends: 51 [2024-10-12 18:49:03,769 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-10-12 18:49:03,770 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:49:03,770 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 136 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 18:49:03,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-12 18:49:03,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-10-12 18:49:03,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.225) internal successors, (49), 41 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-12 18:49:03,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2024-10-12 18:49:03,777 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 33 [2024-10-12 18:49:03,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:49:03,778 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2024-10-12 18:49:03,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-12 18:49:03,778 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2024-10-12 18:49:03,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-12 18:49:03,779 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:49:03,779 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:49:03,788 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 18:49:03,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:49:03,984 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:49:03,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:49:03,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1620601913, now seen corresponding path program 2 times [2024-10-12 18:49:03,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:49:03,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074572236] [2024-10-12 18:49:03,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:49:03,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:49:04,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:49:04,453 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:49:04,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:49:04,455 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 18:49:04,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:49:04,461 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-12 18:49:04,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:49:04,474 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-12 18:49:04,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:49:04,481 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-12 18:49:04,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:49:04,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074572236] [2024-10-12 18:49:04,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074572236] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:49:04,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803781300] [2024-10-12 18:49:04,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 18:49:04,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:49:04,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:49:04,483 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 18:49:04,484 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 18:49:04,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 18:49:04,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:49:04,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-12 18:49:04,592 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:49:05,254 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 18:49:05,255 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:49:07,074 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-12 18:49:07,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803781300] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:49:07,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:49:07,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14, 15] total 30 [2024-10-12 18:49:07,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892095426] [2024-10-12 18:49:07,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:49:07,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-12 18:49:07,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:49:07,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-12 18:49:07,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2024-10-12 18:49:07,080 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 30 states, 29 states have (on average 2.310344827586207) internal successors, (67), 24 states have internal predecessors, (67), 10 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2024-10-12 18:49:08,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:49:08,216 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2024-10-12 18:49:08,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-12 18:49:08,217 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.310344827586207) internal successors, (67), 24 states have internal predecessors, (67), 10 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) Word has length 42 [2024-10-12 18:49:08,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:49:08,218 INFO L225 Difference]: With dead ends: 107 [2024-10-12 18:49:08,218 INFO L226 Difference]: Without dead ends: 61 [2024-10-12 18:49:08,219 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2024-10-12 18:49:08,220 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 28 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-12 18:49:08,220 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 319 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-12 18:49:08,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-10-12 18:49:08,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2024-10-12 18:49:08,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.2) internal successors, (48), 41 states have internal predecessors, (48), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-12 18:49:08,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2024-10-12 18:49:08,235 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 42 [2024-10-12 18:49:08,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:49:08,236 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2024-10-12 18:49:08,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.310344827586207) internal successors, (67), 24 states have internal predecessors, (67), 10 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2024-10-12 18:49:08,236 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2024-10-12 18:49:08,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-12 18:49:08,241 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:49:08,241 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:49:08,260 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 18:49:08,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:49:08,442 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:49:08,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:49:08,442 INFO L85 PathProgramCache]: Analyzing trace with hash -2080148684, now seen corresponding path program 3 times [2024-10-12 18:49:08,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:49:08,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853652547] [2024-10-12 18:49:08,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:49:08,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:49:08,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:49:08,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735100175] [2024-10-12 18:49:08,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 18:49:08,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:49:08,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:49:08,564 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 18:49:08,566 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 18:49:09,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-12 18:49:09,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:49:09,377 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-10-12 18:49:09,379 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:49:31,220 WARN L286 SmtUtils]: Spent 12.02s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-12 18:49:39,235 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-12 18:49:51,259 WARN L286 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-12 18:49:59,275 WARN L286 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-12 18:50:11,304 WARN L286 SmtUtils]: Spent 12.03s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-12 18:50:19,333 WARN L286 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-12 18:50:28,154 WARN L286 SmtUtils]: Spent 8.82s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)