./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/array-programs/copysome1-1.i --full-output --preprocessor.use.memory.slicer false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6ae2ee47 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/array-programs/copysome1-1.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 29c11d006ccc17ffcd2d0ed55176947b470e18e4deadd67e8df28761f278f9af --preprocessor.use.memory.slicer false --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 21:19:13,736 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 21:19:13,812 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 21:19:13,815 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 21:19:13,816 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 21:19:13,830 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 21:19:13,830 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 21:19:13,830 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 21:19:13,831 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 21:19:13,834 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 21:19:13,834 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 21:19:13,834 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 21:19:13,835 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 21:19:13,836 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 21:19:13,836 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 21:19:13,837 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 21:19:13,837 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 21:19:13,837 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 21:19:13,837 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 21:19:13,837 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 21:19:13,837 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 21:19:13,838 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 21:19:13,838 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 21:19:13,838 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 21:19:13,838 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 21:19:13,839 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 21:19:13,839 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 21:19:13,839 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 21:19:13,839 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 21:19:13,840 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 21:19:13,840 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 21:19:13,840 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 21:19:13,841 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 21:19:13,841 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 21:19:13,841 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 21:19:13,841 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 21:19:13,841 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 21:19:13,841 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 21:19:13,842 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 21:19:13,842 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 21:19:13,842 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 21:19:13,842 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 21:19:13,842 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 29c11d006ccc17ffcd2d0ed55176947b470e18e4deadd67e8df28761f278f9af Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> false [2023-11-22 21:19:14,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 21:19:14,107 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 21:19:14,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 21:19:14,110 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 21:19:14,111 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 21:19:14,112 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome1-1.i [2023-11-22 21:19:15,163 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 21:19:15,305 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 21:19:15,305 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/copysome1-1.i [2023-11-22 21:19:15,310 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f89653903/4bfdc8afed9143a08a69cf5158bf64d2/FLAG911e1c724 [2023-11-22 21:19:15,319 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f89653903/4bfdc8afed9143a08a69cf5158bf64d2 [2023-11-22 21:19:15,321 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 21:19:15,322 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 21:19:15,323 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 21:19:15,323 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 21:19:15,327 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 21:19:15,327 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:19:15" (1/1) ... [2023-11-22 21:19:15,328 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@92ebcf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:19:15, skipping insertion in model container [2023-11-22 21:19:15,328 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:19:15" (1/1) ... [2023-11-22 21:19:15,342 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 21:19:15,436 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-programs/copysome1-1.i[806,819] [2023-11-22 21:19:15,447 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 21:19:15,453 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 21:19:15,462 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-programs/copysome1-1.i[806,819] [2023-11-22 21:19:15,469 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 21:19:15,479 INFO L206 MainTranslator]: Completed translation [2023-11-22 21:19:15,480 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:19:15 WrapperNode [2023-11-22 21:19:15,480 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 21:19:15,481 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 21:19:15,481 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 21:19:15,481 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 21:19:15,486 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:19:15" (1/1) ... [2023-11-22 21:19:15,493 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:19:15" (1/1) ... [2023-11-22 21:19:15,506 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2023-11-22 21:19:15,506 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 21:19:15,507 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 21:19:15,507 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 21:19:15,507 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 21:19:15,514 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:19:15" (1/1) ... [2023-11-22 21:19:15,515 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:19:15" (1/1) ... [2023-11-22 21:19:15,521 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:19:15" (1/1) ... [2023-11-22 21:19:15,521 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:19:15" (1/1) ... [2023-11-22 21:19:15,525 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:19:15" (1/1) ... [2023-11-22 21:19:15,528 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:19:15" (1/1) ... [2023-11-22 21:19:15,529 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:19:15" (1/1) ... [2023-11-22 21:19:15,529 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:19:15" (1/1) ... [2023-11-22 21:19:15,530 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 21:19:15,531 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 21:19:15,531 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 21:19:15,531 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 21:19:15,532 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:19:15" (1/1) ... [2023-11-22 21:19:15,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 21:19:15,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:19:15,564 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-22 21:19:15,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-22 21:19:15,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 21:19:15,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-22 21:19:15,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 21:19:15,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-22 21:19:15,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 21:19:15,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 21:19:15,604 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-22 21:19:15,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 21:19:15,664 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 21:19:15,667 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 21:19:15,825 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 21:19:15,863 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 21:19:15,863 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-22 21:19:15,864 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:19:15 BoogieIcfgContainer [2023-11-22 21:19:15,864 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 21:19:15,869 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 21:19:15,869 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 21:19:15,871 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 21:19:15,872 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:19:15" (1/3) ... [2023-11-22 21:19:15,873 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ed64861 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:19:15, skipping insertion in model container [2023-11-22 21:19:15,873 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:19:15" (2/3) ... [2023-11-22 21:19:15,874 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ed64861 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:19:15, skipping insertion in model container [2023-11-22 21:19:15,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:19:15" (3/3) ... [2023-11-22 21:19:15,876 INFO L112 eAbstractionObserver]: Analyzing ICFG copysome1-1.i [2023-11-22 21:19:15,890 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 21:19:15,890 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 21:19:15,926 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 21:19:15,933 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@420eaab7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 21:19:15,934 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-22 21:19:15,938 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:19:15,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-22 21:19:15,944 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:19:15,945 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:19:15,945 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:19:15,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:19:15,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1300637357, now seen corresponding path program 1 times [2023-11-22 21:19:15,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:19:15,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746310033] [2023-11-22 21:19:15,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:19:15,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:19:16,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:19:16,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 21:19:16,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:19:16,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746310033] [2023-11-22 21:19:16,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746310033] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:19:16,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 21:19:16,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 21:19:16,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812706363] [2023-11-22 21:19:16,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:19:16,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 21:19:16,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:19:16,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 21:19:16,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 21:19:16,188 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:19:16,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:19:16,227 INFO L93 Difference]: Finished difference Result 34 states and 53 transitions. [2023-11-22 21:19:16,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 21:19:16,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-22 21:19:16,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:19:16,238 INFO L225 Difference]: With dead ends: 34 [2023-11-22 21:19:16,239 INFO L226 Difference]: Without dead ends: 18 [2023-11-22 21:19:16,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 21:19:16,244 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 3 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 21:19:16,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 23 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 21:19:16,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-22 21:19:16,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2023-11-22 21:19:16,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:19:16,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2023-11-22 21:19:16,268 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2023-11-22 21:19:16,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:19:16,268 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2023-11-22 21:19:16,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:19:16,269 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2023-11-22 21:19:16,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-22 21:19:16,269 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:19:16,269 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:19:16,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 21:19:16,270 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:19:16,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:19:16,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1547209917, now seen corresponding path program 1 times [2023-11-22 21:19:16,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:19:16,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709926240] [2023-11-22 21:19:16,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:19:16,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:19:16,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:19:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 21:19:16,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:19:16,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709926240] [2023-11-22 21:19:16,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709926240] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:19:16,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090578084] [2023-11-22 21:19:16,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:19:16,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:19:16,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:19:16,465 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:19:16,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-22 21:19:16,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:19:16,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 21:19:16,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:19:16,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 21:19:16,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:19:16,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 21:19:16,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090578084] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:19:16,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:19:16,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-22 21:19:16,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427914883] [2023-11-22 21:19:16,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:19:16,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 21:19:16,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:19:16,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 21:19:16,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-22 21:19:16,588 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:19:16,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:19:16,634 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2023-11-22 21:19:16,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 21:19:16,635 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-22 21:19:16,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:19:16,636 INFO L225 Difference]: With dead ends: 41 [2023-11-22 21:19:16,636 INFO L226 Difference]: Without dead ends: 28 [2023-11-22 21:19:16,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-22 21:19:16,638 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 21:19:16,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 30 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 21:19:16,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-22 21:19:16,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-22 21:19:16,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:19:16,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2023-11-22 21:19:16,643 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 13 [2023-11-22 21:19:16,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:19:16,643 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2023-11-22 21:19:16,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:19:16,644 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2023-11-22 21:19:16,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-22 21:19:16,645 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:19:16,645 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:19:16,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-22 21:19:16,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:19:16,862 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:19:16,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:19:16,862 INFO L85 PathProgramCache]: Analyzing trace with hash -845296322, now seen corresponding path program 2 times [2023-11-22 21:19:16,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:19:16,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914148383] [2023-11-22 21:19:16,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:19:16,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:19:16,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:19:17,043 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-22 21:19:17,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:19:17,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914148383] [2023-11-22 21:19:17,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914148383] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:19:17,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656010881] [2023-11-22 21:19:17,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 21:19:17,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:19:17,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:19:17,045 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:19:17,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-22 21:19:17,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 21:19:17,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:19:17,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-22 21:19:17,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:19:17,140 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-22 21:19:17,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:19:17,198 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-22 21:19:17,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656010881] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:19:17,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:19:17,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-22 21:19:17,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346371533] [2023-11-22 21:19:17,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:19:17,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-22 21:19:17,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:19:17,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-22 21:19:17,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-22 21:19:17,201 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:19:17,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:19:17,287 INFO L93 Difference]: Finished difference Result 74 states and 105 transitions. [2023-11-22 21:19:17,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-22 21:19:17,288 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-22 21:19:17,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:19:17,291 INFO L225 Difference]: With dead ends: 74 [2023-11-22 21:19:17,291 INFO L226 Difference]: Without dead ends: 52 [2023-11-22 21:19:17,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-22 21:19:17,295 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 69 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 21:19:17,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 30 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 21:19:17,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-22 21:19:17,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-11-22 21:19:17,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:19:17,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2023-11-22 21:19:17,309 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 25 [2023-11-22 21:19:17,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:19:17,309 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2023-11-22 21:19:17,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:19:17,309 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2023-11-22 21:19:17,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-22 21:19:17,310 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:19:17,310 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:19:17,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-22 21:19:17,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-22 21:19:17,525 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:19:17,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:19:17,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1362221730, now seen corresponding path program 3 times [2023-11-22 21:19:17,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:19:17,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214853400] [2023-11-22 21:19:17,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:19:17,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:19:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:19:17,856 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-22 21:19:17,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:19:17,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214853400] [2023-11-22 21:19:17,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214853400] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:19:17,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509446576] [2023-11-22 21:19:17,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 21:19:17,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:19:17,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:19:17,863 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:19:17,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-22 21:19:18,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-22 21:19:18,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:19:18,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-22 21:19:18,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:19:18,469 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-22 21:19:18,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:19:18,626 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-22 21:19:18,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509446576] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:19:18,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:19:18,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-22 21:19:18,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154786653] [2023-11-22 21:19:18,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:19:18,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-22 21:19:18,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:19:18,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-22 21:19:18,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-22 21:19:18,631 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:19:18,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:19:18,794 INFO L93 Difference]: Finished difference Result 140 states and 201 transitions. [2023-11-22 21:19:18,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-22 21:19:18,794 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-11-22 21:19:18,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:19:18,795 INFO L225 Difference]: With dead ends: 140 [2023-11-22 21:19:18,795 INFO L226 Difference]: Without dead ends: 100 [2023-11-22 21:19:18,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-22 21:19:18,797 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 219 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 21:19:18,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 57 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 21:19:18,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-22 21:19:18,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-11-22 21:19:18,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.2626262626262625) internal successors, (125), 99 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:19:18,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 125 transitions. [2023-11-22 21:19:18,804 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 125 transitions. Word has length 49 [2023-11-22 21:19:18,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:19:18,805 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 125 transitions. [2023-11-22 21:19:18,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:19:18,805 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 125 transitions. [2023-11-22 21:19:18,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-22 21:19:18,807 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:19:18,807 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:19:18,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-22 21:19:19,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:19:19,017 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:19:19,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:19:19,017 INFO L85 PathProgramCache]: Analyzing trace with hash 2054479262, now seen corresponding path program 4 times [2023-11-22 21:19:19,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:19:19,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747176552] [2023-11-22 21:19:19,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:19:19,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:19:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:19:19,670 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-11-22 21:19:19,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:19:19,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747176552] [2023-11-22 21:19:19,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747176552] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:19:19,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727157948] [2023-11-22 21:19:19,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 21:19:19,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:19:19,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:19:19,672 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:19:19,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-22 21:19:20,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 21:19:20,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:19:20,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-22 21:19:20,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:19:20,171 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-11-22 21:19:20,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:19:20,825 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-11-22 21:19:20,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727157948] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:19:20,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:19:20,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 49 [2023-11-22 21:19:20,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136047634] [2023-11-22 21:19:20,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:19:20,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-22 21:19:20,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:19:20,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-22 21:19:20,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-22 21:19:20,829 INFO L87 Difference]: Start difference. First operand 100 states and 125 transitions. Second operand has 49 states, 49 states have (on average 3.5306122448979593) internal successors, (173), 49 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:19:21,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:19:21,087 INFO L93 Difference]: Finished difference Result 272 states and 393 transitions. [2023-11-22 21:19:21,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-22 21:19:21,088 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.5306122448979593) internal successors, (173), 49 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2023-11-22 21:19:21,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:19:21,089 INFO L225 Difference]: With dead ends: 272 [2023-11-22 21:19:21,089 INFO L226 Difference]: Without dead ends: 196 [2023-11-22 21:19:21,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-22 21:19:21,090 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 123 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 21:19:21,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 75 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 21:19:21,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-11-22 21:19:21,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2023-11-22 21:19:21,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.2564102564102564) internal successors, (245), 195 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:19:21,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 245 transitions. [2023-11-22 21:19:21,100 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 245 transitions. Word has length 97 [2023-11-22 21:19:21,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:19:21,101 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 245 transitions. [2023-11-22 21:19:21,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.5306122448979593) internal successors, (173), 49 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:19:21,101 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 245 transitions. [2023-11-22 21:19:21,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2023-11-22 21:19:21,103 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:19:21,103 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:19:21,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-22 21:19:21,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:19:21,315 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:19:21,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:19:21,316 INFO L85 PathProgramCache]: Analyzing trace with hash -827167202, now seen corresponding path program 5 times [2023-11-22 21:19:21,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:19:21,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095442563] [2023-11-22 21:19:21,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:19:21,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:19:21,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:19:23,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2023-11-22 21:19:23,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:19:23,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095442563] [2023-11-22 21:19:23,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095442563] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:19:23,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5271872] [2023-11-22 21:19:23,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 21:19:23,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:19:23,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:19:23,202 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) [2023-11-22 21:19:23,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process Killed by 15