./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/divbin.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/divbin.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c49641164907d0e2939c5443b0376a8e4377b34a58fd804ad01c6cf7d42c55dc --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 02:00:06,792 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 02:00:06,882 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 02:00:06,889 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 02:00:06,890 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 02:00:06,915 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 02:00:06,916 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 02:00:06,916 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 02:00:06,917 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 02:00:06,918 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 02:00:06,918 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 02:00:06,918 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 02:00:06,919 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 02:00:06,919 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 02:00:06,921 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 02:00:06,922 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 02:00:06,922 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 02:00:06,922 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 02:00:06,924 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 02:00:06,924 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 02:00:06,925 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 02:00:06,927 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 02:00:06,928 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 02:00:06,928 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 02:00:06,928 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 02:00:06,928 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 02:00:06,929 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 02:00:06,929 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 02:00:06,929 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 02:00:06,929 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 02:00:06,930 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 02:00:06,930 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 02:00:06,930 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 02:00:06,930 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 02:00:06,931 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 02:00:06,931 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 02:00:06,931 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 02:00:06,931 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 02:00:06,932 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 02:00:06,933 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 02:00:06,933 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 02:00:06,933 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 02:00:06,934 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c49641164907d0e2939c5443b0376a8e4377b34a58fd804ad01c6cf7d42c55dc [2024-10-11 02:00:07,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 02:00:07,200 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 02:00:07,203 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 02:00:07,204 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 02:00:07,205 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 02:00:07,206 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/divbin.i [2024-10-11 02:00:08,621 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 02:00:08,819 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 02:00:08,819 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/divbin.i [2024-10-11 02:00:08,826 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/8c638e7ee/53d53d211ab94d1b839e43197ca68770/FLAG69e452392 [2024-10-11 02:00:08,841 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/8c638e7ee/53d53d211ab94d1b839e43197ca68770 [2024-10-11 02:00:08,843 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 02:00:08,845 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 02:00:08,850 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 02:00:08,850 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 02:00:08,855 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 02:00:08,856 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:00:08" (1/1) ... [2024-10-11 02:00:08,857 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@310166ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:08, skipping insertion in model container [2024-10-11 02:00:08,857 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:00:08" (1/1) ... [2024-10-11 02:00:08,876 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 02:00:09,042 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/divbin.i[950,963] [2024-10-11 02:00:09,061 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 02:00:09,073 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 02:00:09,087 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/divbin.i[950,963] [2024-10-11 02:00:09,095 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 02:00:09,117 INFO L204 MainTranslator]: Completed translation [2024-10-11 02:00:09,118 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:09 WrapperNode [2024-10-11 02:00:09,118 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 02:00:09,119 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 02:00:09,120 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 02:00:09,120 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 02:00:09,126 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:09" (1/1) ... [2024-10-11 02:00:09,132 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:09" (1/1) ... [2024-10-11 02:00:09,150 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 46 [2024-10-11 02:00:09,151 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 02:00:09,152 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 02:00:09,152 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 02:00:09,152 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 02:00:09,162 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:09" (1/1) ... [2024-10-11 02:00:09,163 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:09" (1/1) ... [2024-10-11 02:00:09,164 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:09" (1/1) ... [2024-10-11 02:00:09,178 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-11 02:00:09,179 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:09" (1/1) ... [2024-10-11 02:00:09,179 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:09" (1/1) ... [2024-10-11 02:00:09,181 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:09" (1/1) ... [2024-10-11 02:00:09,186 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:09" (1/1) ... [2024-10-11 02:00:09,187 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:09" (1/1) ... [2024-10-11 02:00:09,189 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:09" (1/1) ... [2024-10-11 02:00:09,190 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 02:00:09,191 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 02:00:09,191 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 02:00:09,191 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 02:00:09,192 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:09" (1/1) ... [2024-10-11 02:00:09,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 02:00:09,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:00:09,225 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 02:00:09,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 02:00:09,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 02:00:09,280 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-11 02:00:09,281 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-11 02:00:09,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 02:00:09,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 02:00:09,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 02:00:09,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-11 02:00:09,284 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-11 02:00:09,352 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 02:00:09,354 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 02:00:09,517 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-10-11 02:00:09,517 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 02:00:09,544 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 02:00:09,544 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-11 02:00:09,545 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:00:09 BoogieIcfgContainer [2024-10-11 02:00:09,545 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 02:00:09,547 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 02:00:09,547 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 02:00:09,550 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 02:00:09,551 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:00:08" (1/3) ... [2024-10-11 02:00:09,552 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@331ea977 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:00:09, skipping insertion in model container [2024-10-11 02:00:09,552 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:00:09" (2/3) ... [2024-10-11 02:00:09,552 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@331ea977 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:00:09, skipping insertion in model container [2024-10-11 02:00:09,553 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:00:09" (3/3) ... [2024-10-11 02:00:09,554 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin.i [2024-10-11 02:00:09,570 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 02:00:09,571 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 02:00:09,633 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 02:00:09,647 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;@347c4395, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 02:00:09,647 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-11 02:00:09,653 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 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) [2024-10-11 02:00:09,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-11 02:00:09,660 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:00:09,661 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:00:09,662 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:00:09,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:00:09,667 INFO L85 PathProgramCache]: Analyzing trace with hash 2077086955, now seen corresponding path program 1 times [2024-10-11 02:00:09,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:00:09,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813112421] [2024-10-11 02:00:09,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:09,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:00:09,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:09,831 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:00:09,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:09,841 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:00:09,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:00:09,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:00:09,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813112421] [2024-10-11 02:00:09,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813112421] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:00:09,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:00:09,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 02:00:09,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968231636] [2024-10-11 02:00:09,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:00:09,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-11 02:00:09,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:00:09,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-11 02:00:09,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 02:00:09,882 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 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) [2024-10-11 02:00:09,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:00:09,906 INFO L93 Difference]: Finished difference Result 44 states and 67 transitions. [2024-10-11 02:00:09,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-11 02:00:09,909 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 [2024-10-11 02:00:09,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:00:09,914 INFO L225 Difference]: With dead ends: 44 [2024-10-11 02:00:09,914 INFO L226 Difference]: Without dead ends: 21 [2024-10-11 02:00:09,917 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 [2024-10-11 02:00:09,919 INFO L432 NwaCegarLoop]: 25 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, 25 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 [2024-10-11 02:00:09,920 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:00:09,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-10-11 02:00:09,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-10-11 02:00:09,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 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) [2024-10-11 02:00:09,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2024-10-11 02:00:09,972 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 18 [2024-10-11 02:00:09,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:00:09,972 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2024-10-11 02:00:09,972 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) [2024-10-11 02:00:09,973 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2024-10-11 02:00:09,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-11 02:00:09,974 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:00:09,974 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:00:09,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 02:00:09,975 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:00:09,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:00:09,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1665632571, now seen corresponding path program 1 times [2024-10-11 02:00:09,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:00:09,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141246824] [2024-10-11 02:00:09,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:09,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:00:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:00:10,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1684161628] [2024-10-11 02:00:10,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:10,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:10,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:00:10,047 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:00:10,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 02:00:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:10,105 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 02:00:10,114 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:00:10,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:00:10,232 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 02:00:10,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:00:10,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141246824] [2024-10-11 02:00:10,233 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:00:10,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684161628] [2024-10-11 02:00:10,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684161628] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:00:10,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:00:10,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 02:00:10,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211747135] [2024-10-11 02:00:10,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:00:10,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:00:10,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:00:10,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:00:10,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:00:10,237 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 02:00:10,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:00:10,323 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2024-10-11 02:00:10,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:00:10,324 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 19 [2024-10-11 02:00:10,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:00:10,325 INFO L225 Difference]: With dead ends: 32 [2024-10-11 02:00:10,326 INFO L226 Difference]: Without dead ends: 29 [2024-10-11 02:00:10,326 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:00:10,328 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 61 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 [2024-10-11 02:00:10,328 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 61 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:00:10,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-11 02:00:10,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-10-11 02:00:10,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 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) [2024-10-11 02:00:10,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2024-10-11 02:00:10,341 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 19 [2024-10-11 02:00:10,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:00:10,342 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2024-10-11 02:00:10,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 02:00:10,342 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2024-10-11 02:00:10,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-11 02:00:10,344 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:00:10,344 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:00:10,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-11 02:00:10,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:10,546 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:00:10,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:00:10,546 INFO L85 PathProgramCache]: Analyzing trace with hash -974634146, now seen corresponding path program 1 times [2024-10-11 02:00:10,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:00:10,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905245786] [2024-10-11 02:00:10,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:10,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:00:10,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:11,082 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:00:11,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:11,087 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:00:11,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:11,091 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 02:00:11,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:11,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:00:11,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:00:11,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905245786] [2024-10-11 02:00:11,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905245786] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:00:11,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:00:11,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 02:00:11,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576407867] [2024-10-11 02:00:11,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:00:11,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 02:00:11,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:00:11,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 02:00:11,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 02:00:11,104 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2024-10-11 02:00:11,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:00:11,142 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2024-10-11 02:00:11,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 02:00:11,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 27 [2024-10-11 02:00:11,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:00:11,147 INFO L225 Difference]: With dead ends: 53 [2024-10-11 02:00:11,147 INFO L226 Difference]: Without dead ends: 31 [2024-10-11 02:00:11,148 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 [2024-10-11 02:00:11,149 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 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 [2024-10-11 02:00:11,149 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:00:11,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-10-11 02:00:11,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-10-11 02:00:11,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 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) [2024-10-11 02:00:11,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2024-10-11 02:00:11,163 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 27 [2024-10-11 02:00:11,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:00:11,164 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2024-10-11 02:00:11,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2024-10-11 02:00:11,165 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2024-10-11 02:00:11,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-11 02:00:11,166 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:00:11,166 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] [2024-10-11 02:00:11,167 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 02:00:11,167 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:00:11,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:00:11,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1045331897, now seen corresponding path program 1 times [2024-10-11 02:00:11,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:00:11,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607840482] [2024-10-11 02:00:11,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:11,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:00:11,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:00:11,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558775227] [2024-10-11 02:00:11,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:11,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:11,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:00:11,219 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:00:11,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 02:00:11,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:11,328 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-11 02:00:11,331 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:00:11,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 02:00:11,499 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:00:19,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:00:19,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607840482] [2024-10-11 02:00:19,937 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:00:19,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558775227] [2024-10-11 02:00:19,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558775227] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:00:19,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 02:00:19,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-10-11 02:00:19,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343102999] [2024-10-11 02:00:19,942 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 02:00:19,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 02:00:19,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:00:19,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 02:00:19,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=122, Unknown=1, NotChecked=0, Total=156 [2024-10-11 02:00:19,944 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-11 02:00:20,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:00:20,060 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2024-10-11 02:00:20,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 02:00:20,061 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2024-10-11 02:00:20,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:00:20,062 INFO L225 Difference]: With dead ends: 41 [2024-10-11 02:00:20,063 INFO L226 Difference]: Without dead ends: 38 [2024-10-11 02:00:20,064 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=39, Invalid=142, Unknown=1, NotChecked=0, Total=182 [2024-10-11 02:00:20,065 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:00:20,066 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 86 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:00:20,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-11 02:00:20,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-10-11 02:00:20,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 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) [2024-10-11 02:00:20,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2024-10-11 02:00:20,078 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 29 [2024-10-11 02:00:20,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:00:20,078 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2024-10-11 02:00:20,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-11 02:00:20,079 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2024-10-11 02:00:20,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-11 02:00:20,081 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:00:20,081 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:00:20,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 02:00:20,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:20,286 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:00:20,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:00:20,287 INFO L85 PathProgramCache]: Analyzing trace with hash -146285604, now seen corresponding path program 2 times [2024-10-11 02:00:20,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:00:20,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253256556] [2024-10-11 02:00:20,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:20,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:00:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:20,712 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:00:20,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:20,717 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:00:20,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:20,720 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-11 02:00:20,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:20,732 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-11 02:00:20,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:00:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-11 02:00:20,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:00:20,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253256556] [2024-10-11 02:00:20,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253256556] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:00:20,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943377675] [2024-10-11 02:00:20,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 02:00:20,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:20,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:00:20,744 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:00:20,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 02:00:20,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 02:00:20,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:00:20,890 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-11 02:00:20,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:00:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-11 02:00:21,354 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:00:22,039 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-11 02:00:22,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943377675] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:00:22,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 02:00:22,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 9] total 22 [2024-10-11 02:00:22,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089464937] [2024-10-11 02:00:22,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 02:00:22,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-11 02:00:22,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:00:22,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-11 02:00:22,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2024-10-11 02:00:22,042 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 19 states have internal predecessors, (45), 8 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2024-10-11 02:00:22,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:00:22,603 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2024-10-11 02:00:22,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 02:00:22,604 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 19 states have internal predecessors, (45), 8 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 37 [2024-10-11 02:00:22,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:00:22,605 INFO L225 Difference]: With dead ends: 76 [2024-10-11 02:00:22,606 INFO L226 Difference]: Without dead ends: 43 [2024-10-11 02:00:22,607 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2024-10-11 02:00:22,608 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-11 02:00:22,609 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 186 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-11 02:00:22,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-11 02:00:22,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2024-10-11 02:00:22,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 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) [2024-10-11 02:00:22,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2024-10-11 02:00:22,625 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 37 [2024-10-11 02:00:22,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:00:22,626 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2024-10-11 02:00:22,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 19 states have internal predecessors, (45), 8 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2024-10-11 02:00:22,626 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2024-10-11 02:00:22,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-11 02:00:22,627 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:00:22,627 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:00:22,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-11 02:00:22,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:22,832 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:00:22,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:00:22,833 INFO L85 PathProgramCache]: Analyzing trace with hash 794731127, now seen corresponding path program 3 times [2024-10-11 02:00:22,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:00:22,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558665979] [2024-10-11 02:00:22,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:00:22,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:00:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:00:22,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2094239355] [2024-10-11 02:00:22,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 02:00:22,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:00:22,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:00:22,977 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:00:22,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 02:00:23,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-11 02:00:23,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:00:23,350 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-10-11 02:00:23,353 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:00:24,293 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 02:00:24,294 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:01:09,405 WARN L286 SmtUtils]: Spent 16.04s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-11 02:01:29,460 WARN L286 SmtUtils]: Spent 16.03s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-11 02:01:45,518 WARN L286 SmtUtils]: Spent 16.06s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)