./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/array-cav19/array_init_both_ends_multiple_sum.c --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-cav19/array_init_both_ends_multiple_sum.c -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 54df2940ae4d13c219208dbc33c051105041923e87e99fc1d1620ede83e75392 --preprocessor.use.memory.slicer false --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 21:03:03,126 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 21:03:03,212 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 21:03:03,217 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 21:03:03,218 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 21:03:03,240 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 21:03:03,241 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 21:03:03,241 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 21:03:03,242 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 21:03:03,245 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 21:03:03,245 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 21:03:03,245 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 21:03:03,246 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 21:03:03,247 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 21:03:03,247 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 21:03:03,247 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 21:03:03,247 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 21:03:03,248 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 21:03:03,248 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 21:03:03,248 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 21:03:03,248 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 21:03:03,249 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 21:03:03,249 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 21:03:03,249 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 21:03:03,249 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 21:03:03,249 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 21:03:03,250 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 21:03:03,250 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 21:03:03,250 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 21:03:03,250 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 21:03:03,251 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 21:03:03,251 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 21:03:03,252 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 21:03:03,252 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 21:03:03,252 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 21:03:03,252 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 21:03:03,252 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 21:03:03,253 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 21:03:03,253 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 21:03:03,253 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 21:03:03,253 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 21:03:03,253 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 21:03:03,254 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54df2940ae4d13c219208dbc33c051105041923e87e99fc1d1620ede83e75392 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> false [2023-11-22 21:03:03,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 21:03:03,482 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 21:03:03,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 21:03:03,484 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 21:03:03,484 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 21:03:03,485 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-cav19/array_init_both_ends_multiple_sum.c [2023-11-22 21:03:04,482 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 21:03:04,599 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 21:03:04,599 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-cav19/array_init_both_ends_multiple_sum.c [2023-11-22 21:03:04,604 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba7b39f95/2f107ad949c94560bd529c4f6e288a6a/FLAG83c7bf98e [2023-11-22 21:03:04,612 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba7b39f95/2f107ad949c94560bd529c4f6e288a6a [2023-11-22 21:03:04,614 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 21:03:04,615 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 21:03:04,616 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 21:03:04,616 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 21:03:04,619 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 21:03:04,620 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:03:04" (1/1) ... [2023-11-22 21:03:04,621 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fd66dce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:03:04, skipping insertion in model container [2023-11-22 21:03:04,621 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:03:04" (1/1) ... [2023-11-22 21:03:04,636 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 21:03:04,760 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-cav19/array_init_both_ends_multiple_sum.c[424,437] [2023-11-22 21:03:04,775 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 21:03:04,783 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 21:03:04,791 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-cav19/array_init_both_ends_multiple_sum.c[424,437] [2023-11-22 21:03:04,800 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 21:03:04,811 INFO L206 MainTranslator]: Completed translation [2023-11-22 21:03:04,811 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:03:04 WrapperNode [2023-11-22 21:03:04,811 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 21:03:04,812 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 21:03:04,812 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 21:03:04,812 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 21:03:04,817 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:03:04" (1/1) ... [2023-11-22 21:03:04,822 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:03:04" (1/1) ... [2023-11-22 21:03:04,836 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61 [2023-11-22 21:03:04,836 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 21:03:04,837 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 21:03:04,837 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 21:03:04,837 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 21:03:04,844 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:03:04" (1/1) ... [2023-11-22 21:03:04,844 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:03:04" (1/1) ... [2023-11-22 21:03:04,853 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:03:04" (1/1) ... [2023-11-22 21:03:04,853 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:03:04" (1/1) ... [2023-11-22 21:03:04,857 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:03:04" (1/1) ... [2023-11-22 21:03:04,859 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:03:04" (1/1) ... [2023-11-22 21:03:04,860 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:03:04" (1/1) ... [2023-11-22 21:03:04,860 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:03:04" (1/1) ... [2023-11-22 21:03:04,861 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 21:03:04,862 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 21:03:04,862 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 21:03:04,862 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 21:03:04,863 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:03:04" (1/1) ... [2023-11-22 21:03:04,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 21:03:04,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:03:04,907 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 21:03:04,924 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 21:03:04,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 21:03:04,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-22 21:03:04,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 21:03:04,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-22 21:03:04,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 21:03:04,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 21:03:04,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-22 21:03:04,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 21:03:05,018 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 21:03:05,020 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 21:03:05,146 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 21:03:05,169 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 21:03:05,169 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-22 21:03:05,169 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:03:05 BoogieIcfgContainer [2023-11-22 21:03:05,169 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 21:03:05,171 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 21:03:05,171 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 21:03:05,173 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 21:03:05,173 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:03:04" (1/3) ... [2023-11-22 21:03:05,174 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15f18320 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:03:05, skipping insertion in model container [2023-11-22 21:03:05,174 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:03:04" (2/3) ... [2023-11-22 21:03:05,174 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15f18320 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:03:05, skipping insertion in model container [2023-11-22 21:03:05,174 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:03:05" (3/3) ... [2023-11-22 21:03:05,175 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_both_ends_multiple_sum.c [2023-11-22 21:03:05,187 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 21:03:05,187 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 21:03:05,219 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 21:03:05,225 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;@629b9dac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 21:03:05,225 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-22 21:03:05,228 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 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 21:03:05,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-22 21:03:05,233 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:03:05,234 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:03:05,235 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:03:05,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:03:05,239 INFO L85 PathProgramCache]: Analyzing trace with hash -725710700, now seen corresponding path program 1 times [2023-11-22 21:03:05,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:03:05,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529012206] [2023-11-22 21:03:05,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:03:05,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:03:05,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:03:05,481 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 21:03:05,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:03:05,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529012206] [2023-11-22 21:03:05,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529012206] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:03:05,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 21:03:05,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 21:03:05,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71223296] [2023-11-22 21:03:05,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:03:05,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 21:03:05,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:03:05,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 21:03:05,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 21:03:05,523 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 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) 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 21:03:05,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:03:05,554 INFO L93 Difference]: Finished difference Result 23 states and 35 transitions. [2023-11-22 21:03:05,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 21:03:05,557 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 21:03:05,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:03:05,562 INFO L225 Difference]: With dead ends: 23 [2023-11-22 21:03:05,562 INFO L226 Difference]: Without dead ends: 11 [2023-11-22 21:03:05,564 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 21:03:05,567 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 21:03:05,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 21:03:05,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-11-22 21:03:05,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-11-22 21:03:05,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 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 21:03:05,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2023-11-22 21:03:05,589 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 9 [2023-11-22 21:03:05,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:03:05,589 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2023-11-22 21:03:05,590 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 21:03:05,590 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2023-11-22 21:03:05,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-22 21:03:05,590 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:03:05,590 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:03:05,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 21:03:05,591 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:03:05,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:03:05,591 INFO L85 PathProgramCache]: Analyzing trace with hash 324573279, now seen corresponding path program 1 times [2023-11-22 21:03:05,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:03:05,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508789092] [2023-11-22 21:03:05,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:03:05,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:03:05,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:03:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 21:03:05,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:03:05,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508789092] [2023-11-22 21:03:05,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508789092] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:03:05,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 21:03:05,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 21:03:05,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907501695] [2023-11-22 21:03:05,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:03:05,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 21:03:05,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:03:05,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 21:03:05,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-22 21:03:05,647 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 21:03:05,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:03:05,668 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2023-11-22 21:03:05,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 21:03:05,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2023-11-22 21:03:05,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:03:05,670 INFO L225 Difference]: With dead ends: 19 [2023-11-22 21:03:05,670 INFO L226 Difference]: Without dead ends: 13 [2023-11-22 21:03:05,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-22 21:03:05,672 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 21:03:05,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 8 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 21:03:05,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-22 21:03:05,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-11-22 21:03:05,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 21:03:05,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-11-22 21:03:05,677 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2023-11-22 21:03:05,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:03:05,678 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-11-22 21:03:05,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 21:03:05,678 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-11-22 21:03:05,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-22 21:03:05,678 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:03:05,679 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:03:05,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-22 21:03:05,679 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:03:05,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:03:05,679 INFO L85 PathProgramCache]: Analyzing trace with hash 708744270, now seen corresponding path program 1 times [2023-11-22 21:03:05,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:03:05,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965400083] [2023-11-22 21:03:05,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:03:05,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:03:05,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:03:05,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:03:05,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:03:05,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965400083] [2023-11-22 21:03:05,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965400083] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:03:05,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353794113] [2023-11-22 21:03:05,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:03:05,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:03:05,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:03:05,747 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 21:03:05,751 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 21:03:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:03:05,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-22 21:03:05,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:03:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:03:05,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:03:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:03:05,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353794113] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:03:05,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:03:05,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-22 21:03:05,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633042380] [2023-11-22 21:03:05,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:03:05,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 21:03:05,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:03:05,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 21:03:05,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-22 21:03:05,917 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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 21:03:05,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:03:05,953 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2023-11-22 21:03:05,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 21:03:05,953 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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 12 [2023-11-22 21:03:05,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:03:05,958 INFO L225 Difference]: With dead ends: 26 [2023-11-22 21:03:05,958 INFO L226 Difference]: Without dead ends: 16 [2023-11-22 21:03:05,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-22 21:03:05,960 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 21:03:05,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 21:03:05,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-22 21:03:05,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-22 21:03:05,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 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 21:03:05,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2023-11-22 21:03:05,967 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2023-11-22 21:03:05,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:03:05,968 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2023-11-22 21:03:05,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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 21:03:05,968 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2023-11-22 21:03:05,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-22 21:03:05,968 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:03:05,968 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:03:05,983 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 21:03:06,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:03:06,173 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:03:06,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:03:06,176 INFO L85 PathProgramCache]: Analyzing trace with hash 964212227, now seen corresponding path program 2 times [2023-11-22 21:03:06,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:03:06,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634145604] [2023-11-22 21:03:06,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:03:06,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:03:06,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:03:06,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-22 21:03:06,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:03:06,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634145604] [2023-11-22 21:03:06,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634145604] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:03:06,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584722409] [2023-11-22 21:03:06,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 21:03:06,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:03:06,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:03:06,366 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 21:03:06,386 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 21:03:06,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 21:03:06,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:03:06,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-22 21:03:06,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:03:06,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:03:06,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:03:06,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:03:06,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584722409] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:03:06,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:03:06,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-11-22 21:03:06,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642130430] [2023-11-22 21:03:06,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:03:06,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-22 21:03:06,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:03:06,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-22 21:03:06,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=114, Unknown=0, NotChecked=0, Total=210 [2023-11-22 21:03:06,587 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 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 21:03:06,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:03:06,723 INFO L93 Difference]: Finished difference Result 50 states and 77 transitions. [2023-11-22 21:03:06,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-22 21:03:06,724 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 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 15 [2023-11-22 21:03:06,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:03:06,725 INFO L225 Difference]: With dead ends: 50 [2023-11-22 21:03:06,725 INFO L226 Difference]: Without dead ends: 40 [2023-11-22 21:03:06,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=214, Unknown=0, NotChecked=0, Total=380 [2023-11-22 21:03:06,726 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 28 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 21:03:06,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 14 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 21:03:06,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-22 21:03:06,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-11-22 21:03:06,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 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 21:03:06,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2023-11-22 21:03:06,735 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 15 [2023-11-22 21:03:06,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:03:06,735 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2023-11-22 21:03:06,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 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 21:03:06,735 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2023-11-22 21:03:06,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-22 21:03:06,736 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:03:06,736 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:03:06,758 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 21:03:06,947 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,SelfDestructingSolverStorable3 [2023-11-22 21:03:06,948 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:03:06,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:03:06,948 INFO L85 PathProgramCache]: Analyzing trace with hash -759122604, now seen corresponding path program 3 times [2023-11-22 21:03:06,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:03:06,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196994479] [2023-11-22 21:03:06,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:03:06,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:03:06,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:03:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-11-22 21:03:07,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:03:07,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196994479] [2023-11-22 21:03:07,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196994479] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:03:07,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173930573] [2023-11-22 21:03:07,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 21:03:07,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:03:07,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:03:07,172 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 21:03:07,194 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 21:03:07,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-22 21:03:07,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:03:07,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-22 21:03:07,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:03:07,474 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-11-22 21:03:07,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:03:07,696 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-11-22 21:03:07,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173930573] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:03:07,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:03:07,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2023-11-22 21:03:07,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981676975] [2023-11-22 21:03:07,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:03:07,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-22 21:03:07,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:03:07,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-22 21:03:07,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=753, Unknown=0, NotChecked=0, Total=1332 [2023-11-22 21:03:07,699 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 36 states have internal predecessors, (51), 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 21:03:08,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:03:08,048 INFO L93 Difference]: Finished difference Result 104 states and 143 transitions. [2023-11-22 21:03:08,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-22 21:03:08,048 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 36 states have internal predecessors, (51), 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 39 [2023-11-22 21:03:08,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:03:08,049 INFO L225 Difference]: With dead ends: 104 [2023-11-22 21:03:08,049 INFO L226 Difference]: Without dead ends: 76 [2023-11-22 21:03:08,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=876, Invalid=1380, Unknown=0, NotChecked=0, Total=2256 [2023-11-22 21:03:08,051 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 34 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 21:03:08,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 23 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 21:03:08,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-22 21:03:08,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2023-11-22 21:03:08,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 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 21:03:08,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2023-11-22 21:03:08,060 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 39 [2023-11-22 21:03:08,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:03:08,060 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2023-11-22 21:03:08,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 36 states have internal predecessors, (51), 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 21:03:08,061 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2023-11-22 21:03:08,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-22 21:03:08,062 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:03:08,062 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:03:08,084 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 21:03:08,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:03:08,283 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:03:08,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:03:08,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1720469460, now seen corresponding path program 4 times [2023-11-22 21:03:08,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:03:08,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838215651] [2023-11-22 21:03:08,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:03:08,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:03:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:03:08,969 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2023-11-22 21:03:08,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:03:08,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838215651] [2023-11-22 21:03:08,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838215651] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:03:08,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170050051] [2023-11-22 21:03:08,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 21:03:08,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:03:08,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:03:08,980 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 21:03:09,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process Killed by 15