./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector-loops/overflow_1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/bitvector-loops/overflow_1-2.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 fd15e6a5481e5709ee106d67fec16050e066e3720bb675b6df23302700c97f29 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 09:33:43,626 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 09:33:43,717 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 09:33:43,723 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 09:33:43,724 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 09:33:43,767 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 09:33:43,768 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 09:33:43,768 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 09:33:43,769 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 09:33:43,769 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 09:33:43,770 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 09:33:43,770 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 09:33:43,771 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 09:33:43,771 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 09:33:43,771 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 09:33:43,772 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 09:33:43,772 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 09:33:43,772 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 09:33:43,773 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 09:33:43,773 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 09:33:43,773 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 09:33:43,774 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 09:33:43,774 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 09:33:43,774 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 09:33:43,774 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 09:33:43,775 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 09:33:43,775 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 09:33:43,775 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 09:33:43,775 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 09:33:43,776 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 09:33:43,776 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 09:33:43,776 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 09:33:43,776 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 09:33:43,777 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 09:33:43,777 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 09:33:43,777 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 09:33:43,779 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 09:33:43,779 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 09:33:43,779 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 09:33:43,780 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 09:33:43,780 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 09:33:43,780 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 09:33:43,781 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd15e6a5481e5709ee106d67fec16050e066e3720bb675b6df23302700c97f29 [2024-11-18 09:33:44,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 09:33:44,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 09:33:44,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 09:33:44,056 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 09:33:44,056 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 09:33:44,057 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector-loops/overflow_1-2.c [2024-11-18 09:33:45,525 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 09:33:45,700 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 09:33:45,701 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-loops/overflow_1-2.c [2024-11-18 09:33:45,707 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4b7bb74c/55391cf60bf1484d950798e331aae229/FLAG4fa14180c [2024-11-18 09:33:45,722 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4b7bb74c/55391cf60bf1484d950798e331aae229 [2024-11-18 09:33:45,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 09:33:45,727 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 09:33:45,728 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 09:33:45,728 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 09:33:45,734 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 09:33:45,735 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:33:45" (1/1) ... [2024-11-18 09:33:45,736 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69a771b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:33:45, skipping insertion in model container [2024-11-18 09:33:45,736 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:33:45" (1/1) ... [2024-11-18 09:33:45,753 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 09:33:45,907 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-loops/overflow_1-2.c[324,337] [2024-11-18 09:33:45,916 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 09:33:45,925 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 09:33:45,933 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-loops/overflow_1-2.c[324,337] [2024-11-18 09:33:45,935 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 09:33:45,949 INFO L204 MainTranslator]: Completed translation [2024-11-18 09:33:45,949 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:33:45 WrapperNode [2024-11-18 09:33:45,949 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 09:33:45,950 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 09:33:45,950 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 09:33:45,951 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 09:33:45,957 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:33:45" (1/1) ... [2024-11-18 09:33:45,963 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:33:45" (1/1) ... [2024-11-18 09:33:45,977 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 22 [2024-11-18 09:33:45,977 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 09:33:45,978 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 09:33:45,982 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 09:33:45,982 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 09:33:45,990 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:33:45" (1/1) ... [2024-11-18 09:33:45,990 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:33:45" (1/1) ... [2024-11-18 09:33:45,991 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:33:45" (1/1) ... [2024-11-18 09:33:45,998 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-18 09:33:45,999 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:33:45" (1/1) ... [2024-11-18 09:33:45,999 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:33:45" (1/1) ... [2024-11-18 09:33:46,000 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:33:45" (1/1) ... [2024-11-18 09:33:46,003 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:33:45" (1/1) ... [2024-11-18 09:33:46,004 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:33:45" (1/1) ... [2024-11-18 09:33:46,004 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:33:45" (1/1) ... [2024-11-18 09:33:46,005 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 09:33:46,008 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 09:33:46,008 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 09:33:46,008 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 09:33:46,009 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:33:45" (1/1) ... [2024-11-18 09:33:46,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 09:33:46,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:33:46,038 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-18 09:33:46,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-18 09:33:46,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 09:33:46,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 09:33:46,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 09:33:46,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 09:33:46,173 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 09:33:46,177 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 09:33:46,284 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-18 09:33:46,285 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 09:33:46,300 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 09:33:46,300 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-18 09:33:46,301 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:33:46 BoogieIcfgContainer [2024-11-18 09:33:46,301 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 09:33:46,303 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 09:33:46,303 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 09:33:46,307 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 09:33:46,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 09:33:45" (1/3) ... [2024-11-18 09:33:46,308 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da95832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:33:46, skipping insertion in model container [2024-11-18 09:33:46,308 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:33:45" (2/3) ... [2024-11-18 09:33:46,309 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da95832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:33:46, skipping insertion in model container [2024-11-18 09:33:46,309 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:33:46" (3/3) ... [2024-11-18 09:33:46,311 INFO L112 eAbstractionObserver]: Analyzing ICFG overflow_1-2.c [2024-11-18 09:33:46,328 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 09:33:46,329 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 09:33:46,393 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 09:33:46,400 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1d89f8d7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 09:33:46,401 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 09:33:46,405 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) 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) [2024-11-18 09:33:46,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-18 09:33:46,412 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:33:46,414 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-18 09:33:46,414 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:33:46,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:33:46,419 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2024-11-18 09:33:46,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:33:46,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902852409] [2024-11-18 09:33:46,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:33:46,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:33:46,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:33:46,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:33:46,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:33:46,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902852409] [2024-11-18 09:33:46,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902852409] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 09:33:46,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 09:33:46,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 09:33:46,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055664438] [2024-11-18 09:33:46,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 09:33:46,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 09:33:46,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:33:46,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 09:33:46,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 09:33:46,729 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) 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) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2024-11-18 09:33:46,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:33:46,756 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2024-11-18 09:33:46,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 09:33:46,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2024-11-18 09:33:46,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:33:46,766 INFO L225 Difference]: With dead ends: 20 [2024-11-18 09:33:46,766 INFO L226 Difference]: Without dead ends: 8 [2024-11-18 09:33:46,768 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 09:33:46,773 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 09:33:46,775 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 09:33:46,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2024-11-18 09:33:46,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2024-11-18 09:33:46,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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) [2024-11-18 09:33:46,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2024-11-18 09:33:46,804 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2024-11-18 09:33:46,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:33:46,805 INFO L471 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2024-11-18 09:33:46,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2024-11-18 09:33:46,805 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2024-11-18 09:33:46,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-18 09:33:46,805 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:33:46,806 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:33:46,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-18 09:33:46,806 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:33:46,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:33:46,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2024-11-18 09:33:46,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:33:46,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279120993] [2024-11-18 09:33:46,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:33:46,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:33:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:33:46,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:33:46,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:33:46,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279120993] [2024-11-18 09:33:46,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279120993] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:33:46,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226953818] [2024-11-18 09:33:46,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:33:46,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:33:46,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:33:46,958 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 09:33:46,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-18 09:33:47,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:33:47,003 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-18 09:33:47,011 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:33:47,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:33:47,049 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:33:47,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:33:47,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226953818] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:33:47,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:33:47,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-18 09:33:47,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737318641] [2024-11-18 09:33:47,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:33:47,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-18 09:33:47,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:33:47,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-18 09:33:47,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-18 09:33:47,102 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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) [2024-11-18 09:33:47,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:33:47,156 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2024-11-18 09:33:47,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 09:33:47,158 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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 7 [2024-11-18 09:33:47,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:33:47,158 INFO L225 Difference]: With dead ends: 15 [2024-11-18 09:33:47,158 INFO L226 Difference]: Without dead ends: 11 [2024-11-18 09:33:47,159 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-11-18 09:33:47,160 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 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 [2024-11-18 09:33:47,160 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 09:33:47,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-11-18 09:33:47,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2024-11-18 09:33:47,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 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) [2024-11-18 09:33:47,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2024-11-18 09:33:47,167 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2024-11-18 09:33:47,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:33:47,167 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2024-11-18 09:33:47,168 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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) [2024-11-18 09:33:47,169 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2024-11-18 09:33:47,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-18 09:33:47,169 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:33:47,169 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2024-11-18 09:33:47,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-18 09:33:47,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:33:47,374 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:33:47,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:33:47,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 2 times [2024-11-18 09:33:47,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:33:47,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62179043] [2024-11-18 09:33:47,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 09:33:47,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:33:47,399 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 09:33:47,399 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:33:47,575 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:33:47,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:33:47,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62179043] [2024-11-18 09:33:47,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62179043] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:33:47,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272868640] [2024-11-18 09:33:47,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 09:33:47,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:33:47,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:33:47,582 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 09:33:47,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-18 09:33:47,631 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 09:33:47,631 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:33:47,633 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-18 09:33:47,634 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:33:47,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:33:47,672 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:33:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:33:47,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272868640] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:33:47,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:33:47,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-18 09:33:47,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109391628] [2024-11-18 09:33:47,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:33:47,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-18 09:33:47,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:33:47,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-18 09:33:47,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2024-11-18 09:33:47,788 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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) [2024-11-18 09:33:47,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:33:47,960 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2024-11-18 09:33:47,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-18 09:33:47,961 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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 10 [2024-11-18 09:33:47,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:33:47,962 INFO L225 Difference]: With dead ends: 21 [2024-11-18 09:33:47,962 INFO L226 Difference]: Without dead ends: 17 [2024-11-18 09:33:47,962 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2024-11-18 09:33:47,963 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 09:33:47,964 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 09:33:47,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-18 09:33:47,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-18 09:33:47,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 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) [2024-11-18 09:33:47,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2024-11-18 09:33:47,972 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2024-11-18 09:33:47,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:33:47,973 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2024-11-18 09:33:47,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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) [2024-11-18 09:33:47,973 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2024-11-18 09:33:47,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-18 09:33:47,973 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:33:47,973 INFO L215 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2024-11-18 09:33:47,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-18 09:33:48,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-18 09:33:48,175 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:33:48,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:33:48,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1628318539, now seen corresponding path program 3 times [2024-11-18 09:33:48,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:33:48,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806703622] [2024-11-18 09:33:48,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 09:33:48,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:33:48,213 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-18 09:33:48,213 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:33:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:33:48,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:33:48,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806703622] [2024-11-18 09:33:48,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806703622] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:33:48,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693179140] [2024-11-18 09:33:48,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 09:33:48,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:33:48,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:33:48,466 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 09:33:48,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-18 09:33:48,517 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-18 09:33:48,517 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:33:48,518 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-18 09:33:48,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:33:48,566 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:33:48,566 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:33:48,870 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:33:48,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693179140] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:33:48,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:33:48,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-11-18 09:33:48,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110971650] [2024-11-18 09:33:48,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:33:48,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-18 09:33:48,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:33:48,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-18 09:33:48,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2024-11-18 09:33:48,873 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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) [2024-11-18 09:34:05,709 WARN L286 SmtUtils]: Spent 16.03s on a formula simplification. DAG size of input: 28 DAG size of output: 27 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-18 09:34:05,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:34:05,724 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2024-11-18 09:34:05,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-18 09:34:05,725 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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 16 [2024-11-18 09:34:05,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:34:05,726 INFO L225 Difference]: With dead ends: 33 [2024-11-18 09:34:05,726 INFO L226 Difference]: Without dead ends: 29 [2024-11-18 09:34:05,727 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2024-11-18 09:34:05,727 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 09:34:05,728 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 09:34:05,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-18 09:34:05,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-18 09:34:05,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 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) [2024-11-18 09:34:05,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2024-11-18 09:34:05,737 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 16 [2024-11-18 09:34:05,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:34:05,737 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2024-11-18 09:34:05,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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) [2024-11-18 09:34:05,737 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2024-11-18 09:34:05,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-18 09:34:05,738 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:34:05,738 INFO L215 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2024-11-18 09:34:05,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-18 09:34:05,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:34:05,939 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:34:05,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:34:05,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1394044683, now seen corresponding path program 4 times [2024-11-18 09:34:05,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:34:05,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008548280] [2024-11-18 09:34:05,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 09:34:05,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:34:05,986 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 09:34:05,986 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:34:06,566 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:34:06,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:34:06,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008548280] [2024-11-18 09:34:06,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008548280] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:34:06,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950566633] [2024-11-18 09:34:06,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 09:34:06,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:34:06,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:34:06,569 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 09:34:06,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-18 09:34:06,630 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 09:34:06,631 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:34:06,632 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-18 09:34:06,634 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:34:06,700 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:34:06,700 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:34:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:34:07,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950566633] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:34:07,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:34:07,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-11-18 09:34:07,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719329441] [2024-11-18 09:34:07,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:34:07,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-18 09:34:07,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:34:07,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-18 09:34:07,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1726, Unknown=0, NotChecked=0, Total=2352 [2024-11-18 09:34:07,920 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 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) [2024-11-18 09:35:16,902 WARN L286 SmtUtils]: Spent 1.07m on a formula simplification. DAG size of input: 76 DAG size of output: 75 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-18 09:35:16,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:35:16,921 INFO L93 Difference]: Finished difference Result 57 states and 80 transitions. [2024-11-18 09:35:16,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-18 09:35:16,922 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 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 28 [2024-11-18 09:35:16,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:35:16,923 INFO L225 Difference]: With dead ends: 57 [2024-11-18 09:35:16,923 INFO L226 Difference]: Without dead ends: 53 [2024-11-18 09:35:16,925 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 70.0s TimeCoverageRelationStatistics Valid=1264, Invalid=3848, Unknown=0, NotChecked=0, Total=5112 [2024-11-18 09:35:16,926 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 09:35:16,927 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 09:35:16,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-18 09:35:16,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-11-18 09:35:16,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 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) [2024-11-18 09:35:16,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2024-11-18 09:35:16,938 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 28 [2024-11-18 09:35:16,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:35:16,938 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2024-11-18 09:35:16,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 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) [2024-11-18 09:35:16,939 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2024-11-18 09:35:16,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-18 09:35:16,940 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:35:16,940 INFO L215 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1] [2024-11-18 09:35:16,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-18 09:35:17,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:35:17,141 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:35:17,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:35:17,141 INFO L85 PathProgramCache]: Analyzing trace with hash 469964427, now seen corresponding path program 5 times [2024-11-18 09:35:17,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:35:17,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195796427] [2024-11-18 09:35:17,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 09:35:17,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:35:17,266 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2024-11-18 09:35:17,266 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:35:18,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:35:18,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:35:18,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195796427] [2024-11-18 09:35:18,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195796427] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:35:18,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792636605] [2024-11-18 09:35:18,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 09:35:18,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:35:18,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:35:18,794 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 09:35:18,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-18 09:35:19,328 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2024-11-18 09:35:19,328 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:35:19,330 WARN L253 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-11-18 09:35:19,332 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:35:19,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:35:19,451 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:35:22,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:35:22,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792636605] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:35:22,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:35:22,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2024-11-18 09:35:22,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796834302] [2024-11-18 09:35:22,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:35:22,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-11-18 09:35:22,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:35:22,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-11-18 09:35:22,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2402, Invalid=6910, Unknown=0, NotChecked=0, Total=9312 [2024-11-18 09:35:22,729 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 97 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 97 states have internal predecessors, (102), 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)