./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound10.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 ebfcdae9f2d92c4e39230ecf30ad4ac0897188e9aff6dcbde95509d87ea826ad --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-19 21:35:27,106 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 21:35:27,156 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-19 21:35:27,161 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 21:35:27,161 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 21:35:27,187 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 21:35:27,188 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 21:35:27,188 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 21:35:27,189 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 21:35:27,190 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 21:35:27,190 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 21:35:27,190 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 21:35:27,191 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 21:35:27,191 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 21:35:27,192 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 21:35:27,193 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 21:35:27,193 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 21:35:27,193 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 21:35:27,193 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 21:35:27,194 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 21:35:27,194 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 21:35:27,197 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 21:35:27,197 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 21:35:27,197 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 21:35:27,197 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 21:35:27,197 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 21:35:27,197 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 21:35:27,198 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 21:35:27,198 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 21:35:27,198 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 21:35:27,198 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 21:35:27,198 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 21:35:27,198 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 21:35:27,199 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 21:35:27,199 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 21:35:27,199 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 21:35:27,199 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 21:35:27,199 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 21:35:27,199 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 21:35:27,199 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 21:35:27,200 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 21:35:27,200 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 21:35:27,200 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebfcdae9f2d92c4e39230ecf30ad4ac0897188e9aff6dcbde95509d87ea826ad [2024-11-19 21:35:27,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 21:35:27,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 21:35:27,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 21:35:27,402 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 21:35:27,402 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 21:35:27,403 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound10.c [2024-11-19 21:35:28,568 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 21:35:28,703 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 21:35:28,703 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound10.c [2024-11-19 21:35:28,713 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02e141ecc/f7d67c04989245518050d6aeb76c75f2/FLAGcaa49b245 [2024-11-19 21:35:28,726 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02e141ecc/f7d67c04989245518050d6aeb76c75f2 [2024-11-19 21:35:28,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 21:35:28,729 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 21:35:28,732 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 21:35:28,732 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 21:35:28,736 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 21:35:28,737 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:35:28" (1/1) ... [2024-11-19 21:35:28,738 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b0f095e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:35:28, skipping insertion in model container [2024-11-19 21:35:28,740 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:35:28" (1/1) ... [2024-11-19 21:35:28,755 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 21:35:28,871 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/nla-digbench-scaling/ps6-ll_unwindbound10.c[458,471] [2024-11-19 21:35:28,885 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 21:35:28,893 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 21:35:28,903 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/nla-digbench-scaling/ps6-ll_unwindbound10.c[458,471] [2024-11-19 21:35:28,910 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 21:35:28,925 INFO L204 MainTranslator]: Completed translation [2024-11-19 21:35:28,926 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:35:28 WrapperNode [2024-11-19 21:35:28,926 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 21:35:28,927 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 21:35:28,928 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 21:35:28,928 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 21:35:28,933 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:35:28" (1/1) ... [2024-11-19 21:35:28,937 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:35:28" (1/1) ... [2024-11-19 21:35:28,951 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2024-11-19 21:35:28,953 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 21:35:28,954 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 21:35:28,954 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 21:35:28,954 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 21:35:28,962 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:35:28" (1/1) ... [2024-11-19 21:35:28,962 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:35:28" (1/1) ... [2024-11-19 21:35:28,964 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:35:28" (1/1) ... [2024-11-19 21:35:28,983 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]. [2024-11-19 21:35:28,983 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:35:28" (1/1) ... [2024-11-19 21:35:28,984 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:35:28" (1/1) ... [2024-11-19 21:35:28,986 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:35:28" (1/1) ... [2024-11-19 21:35:28,988 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:35:28" (1/1) ... [2024-11-19 21:35:28,989 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:35:28" (1/1) ... [2024-11-19 21:35:28,989 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:35:28" (1/1) ... [2024-11-19 21:35:28,992 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 21:35:28,995 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 21:35:28,995 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 21:35:28,995 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 21:35:28,996 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:35:28" (1/1) ... [2024-11-19 21:35:29,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 21:35:29,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:35:29,030 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) [2024-11-19 21:35:29,032 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 [2024-11-19 21:35:29,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 21:35:29,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 21:35:29,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 21:35:29,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 21:35:29,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-19 21:35:29,067 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-19 21:35:29,113 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 21:35:29,117 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 21:35:29,221 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-19 21:35:29,222 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 21:35:29,248 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 21:35:29,250 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-19 21:35:29,250 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:35:29 BoogieIcfgContainer [2024-11-19 21:35:29,250 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 21:35:29,252 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 21:35:29,252 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 21:35:29,257 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 21:35:29,258 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:35:28" (1/3) ... [2024-11-19 21:35:29,259 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1072efe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:35:29, skipping insertion in model container [2024-11-19 21:35:29,260 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:35:28" (2/3) ... [2024-11-19 21:35:29,260 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1072efe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:35:29, skipping insertion in model container [2024-11-19 21:35:29,260 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:35:29" (3/3) ... [2024-11-19 21:35:29,261 INFO L112 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound10.c [2024-11-19 21:35:29,286 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 21:35:29,286 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-19 21:35:29,323 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 21:35:29,331 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;@20adc852, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 21:35:29,331 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-19 21:35:29,334 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 21:35:29,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-19 21:35:29,339 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:35:29,339 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:35:29,340 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:35:29,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:35:29,343 INFO L85 PathProgramCache]: Analyzing trace with hash -579246775, now seen corresponding path program 1 times [2024-11-19 21:35:29,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:35:29,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966825278] [2024-11-19 21:35:29,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:35:29,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:35:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:35:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 21:35:29,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:35:29,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966825278] [2024-11-19 21:35:29,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966825278] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:35:29,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 21:35:29,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 21:35:29,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527311936] [2024-11-19 21:35:29,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:35:29,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-19 21:35:29,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:35:29,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-19 21:35:29,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-19 21:35:29,508 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:35:29,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:35:29,521 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2024-11-19 21:35:29,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-19 21:35:29,523 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-19 21:35:29,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:35:29,528 INFO L225 Difference]: With dead ends: 37 [2024-11-19 21:35:29,528 INFO L226 Difference]: Without dead ends: 16 [2024-11-19 21:35:29,530 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-19 21:35:29,534 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:35:29,535 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:35:29,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-19 21:35:29,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-11-19 21:35:29,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 21:35:29,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2024-11-19 21:35:29,565 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2024-11-19 21:35:29,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:35:29,565 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2024-11-19 21:35:29,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:35:29,566 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2024-11-19 21:35:29,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-19 21:35:29,567 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:35:29,567 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:35:29,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 21:35:29,568 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:35:29,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:35:29,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1986551203, now seen corresponding path program 1 times [2024-11-19 21:35:29,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:35:29,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840697213] [2024-11-19 21:35:29,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:35:29,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:35:29,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:35:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 21:35:29,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:35:29,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840697213] [2024-11-19 21:35:29,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840697213] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:35:29,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 21:35:29,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 21:35:29,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180443348] [2024-11-19 21:35:29,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:35:29,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 21:35:29,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:35:29,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 21:35:29,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 21:35:29,674 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:35:29,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:35:29,702 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2024-11-19 21:35:29,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 21:35:29,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-19 21:35:29,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:35:29,703 INFO L225 Difference]: With dead ends: 26 [2024-11-19 21:35:29,703 INFO L226 Difference]: Without dead ends: 18 [2024-11-19 21:35:29,703 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 21:35:29,704 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:35:29,705 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:35:29,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-19 21:35:29,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-19 21:35:29,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 21:35:29,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2024-11-19 21:35:29,726 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 10 [2024-11-19 21:35:29,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:35:29,727 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2024-11-19 21:35:29,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:35:29,728 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2024-11-19 21:35:29,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-19 21:35:29,729 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:35:29,729 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:35:29,729 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 21:35:29,729 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:35:29,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:35:29,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1984763743, now seen corresponding path program 1 times [2024-11-19 21:35:29,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:35:29,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110536625] [2024-11-19 21:35:29,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:35:29,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:35:29,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:35:29,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [36827084] [2024-11-19 21:35:29,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:35:29,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:35:29,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:35:29,760 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) [2024-11-19 21:35:29,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 21:35:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:35:29,813 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-19 21:35:29,817 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:35:29,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 21:35:29,875 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 21:35:29,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:35:29,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110536625] [2024-11-19 21:35:29,876 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 21:35:29,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36827084] [2024-11-19 21:35:29,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36827084] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:35:29,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 21:35:29,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 21:35:29,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347697989] [2024-11-19 21:35:29,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:35:29,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 21:35:29,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:35:29,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 21:35:29,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 21:35:29,880 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:35:29,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:35:29,913 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2024-11-19 21:35:29,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 21:35:29,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-19 21:35:29,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:35:29,914 INFO L225 Difference]: With dead ends: 28 [2024-11-19 21:35:29,914 INFO L226 Difference]: Without dead ends: 24 [2024-11-19 21:35:29,915 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-19 21:35:29,915 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:35:29,916 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 59 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:35:29,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-19 21:35:29,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-19 21:35:29,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 21:35:29,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-11-19 21:35:29,921 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 10 [2024-11-19 21:35:29,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:35:29,921 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-11-19 21:35:29,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:35:29,921 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-11-19 21:35:29,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-19 21:35:29,922 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:35:29,923 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:35:29,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-19 21:35:30,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:35:30,124 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:35:30,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:35:30,125 INFO L85 PathProgramCache]: Analyzing trace with hash -69803837, now seen corresponding path program 1 times [2024-11-19 21:35:30,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:35:30,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744187811] [2024-11-19 21:35:30,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:35:30,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:35:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:35:30,246 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-19 21:35:30,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:35:30,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 21:35:30,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:35:30,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744187811] [2024-11-19 21:35:30,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744187811] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:35:30,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811069941] [2024-11-19 21:35:30,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:35:30,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:35:30,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:35:30,265 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) [2024-11-19 21:35:30,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 21:35:30,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:35:30,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-19 21:35:30,308 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:35:30,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 21:35:30,337 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:35:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 21:35:30,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811069941] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:35:30,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:35:30,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2024-11-19 21:35:30,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881630554] [2024-11-19 21:35:30,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:35:30,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 21:35:30,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:35:30,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 21:35:30,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-19 21:35:30,384 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 21:35:30,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:35:30,458 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2024-11-19 21:35:30,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 21:35:30,459 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 18 [2024-11-19 21:35:30,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:35:30,460 INFO L225 Difference]: With dead ends: 58 [2024-11-19 21:35:30,460 INFO L226 Difference]: Without dead ends: 50 [2024-11-19 21:35:30,460 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-19 21:35:30,461 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 23 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 67 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 [2024-11-19 21:35:30,461 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 67 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:35:30,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-19 21:35:30,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2024-11-19 21:35:30,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 34 states have internal predecessors, (38), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-19 21:35:30,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2024-11-19 21:35:30,468 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 18 [2024-11-19 21:35:30,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:35:30,468 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2024-11-19 21:35:30,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 21:35:30,469 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2024-11-19 21:35:30,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-19 21:35:30,469 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:35:30,469 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:35:30,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 21:35:30,669 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,SelfDestructingSolverStorable3 [2024-11-19 21:35:30,670 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:35:30,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:35:30,670 INFO L85 PathProgramCache]: Analyzing trace with hash -68016377, now seen corresponding path program 1 times [2024-11-19 21:35:30,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:35:30,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100692727] [2024-11-19 21:35:30,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:35:30,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:35:30,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:35:30,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984046001] [2024-11-19 21:35:30,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:35:30,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:35:30,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:35:30,698 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) [2024-11-19 21:35:30,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 21:35:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:35:30,731 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-19 21:35:30,733 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:35:30,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 21:35:30,790 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:35:30,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 21:35:30,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:35:30,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100692727] [2024-11-19 21:35:30,852 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 21:35:30,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984046001] [2024-11-19 21:35:30,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984046001] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 21:35:30,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 21:35:30,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-19 21:35:30,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145616839] [2024-11-19 21:35:30,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:35:30,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 21:35:30,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:35:30,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 21:35:30,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-19 21:35:30,854 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-19 21:35:30,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:35:30,893 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2024-11-19 21:35:30,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 21:35:30,894 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2024-11-19 21:35:30,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:35:30,895 INFO L225 Difference]: With dead ends: 60 [2024-11-19 21:35:30,898 INFO L226 Difference]: Without dead ends: 52 [2024-11-19 21:35:30,898 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-19 21:35:30,899 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:35:30,899 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 47 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:35:30,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-19 21:35:30,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2024-11-19 21:35:30,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-19 21:35:30,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2024-11-19 21:35:30,919 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 18 [2024-11-19 21:35:30,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:35:30,919 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2024-11-19 21:35:30,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-19 21:35:30,920 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2024-11-19 21:35:30,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-19 21:35:30,922 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:35:30,922 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:35:30,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-19 21:35:31,125 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:35:31,126 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:35:31,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:35:31,126 INFO L85 PathProgramCache]: Analyzing trace with hash 156635680, now seen corresponding path program 1 times [2024-11-19 21:35:31,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:35:31,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337698003] [2024-11-19 21:35:31,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:35:31,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:35:31,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:35:31,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [337388850] [2024-11-19 21:35:31,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:35:31,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:35:31,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:35:31,156 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) [2024-11-19 21:35:31,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 21:35:31,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:35:31,188 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-19 21:35:31,189 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:35:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 21:35:31,272 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:35:31,372 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 21:35:31,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:35:31,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337698003] [2024-11-19 21:35:31,373 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 21:35:31,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337388850] [2024-11-19 21:35:31,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337388850] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:35:31,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 21:35:31,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2024-11-19 21:35:31,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317951440] [2024-11-19 21:35:31,374 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 21:35:31,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 21:35:31,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:35:31,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 21:35:31,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-19 21:35:31,376 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 12 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-19 21:35:31,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:35:31,473 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2024-11-19 21:35:31,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 21:35:31,475 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 29 [2024-11-19 21:35:31,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:35:31,476 INFO L225 Difference]: With dead ends: 55 [2024-11-19 21:35:31,476 INFO L226 Difference]: Without dead ends: 46 [2024-11-19 21:35:31,476 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-11-19 21:35:31,477 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:35:31,477 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 118 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:35:31,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-19 21:35:31,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-11-19 21:35:31,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-19 21:35:31,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2024-11-19 21:35:31,493 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 29 [2024-11-19 21:35:31,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:35:31,494 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2024-11-19 21:35:31,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-19 21:35:31,494 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2024-11-19 21:35:31,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-19 21:35:31,495 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:35:31,495 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:35:31,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 21:35:31,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:35:31,695 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:35:31,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:35:31,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1854611729, now seen corresponding path program 1 times [2024-11-19 21:35:31,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:35:31,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360260592] [2024-11-19 21:35:31,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:35:31,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:35:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:35:31,868 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-19 21:35:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:35:31,874 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-19 21:35:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:35:31,877 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-19 21:35:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:35:31,884 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-11-19 21:35:31,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:35:31,888 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-19 21:35:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:35:31,892 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-19 21:35:31,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:35:31,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360260592] [2024-11-19 21:35:31,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360260592] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:35:31,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481245198] [2024-11-19 21:35:31,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:35:31,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:35:31,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:35:31,895 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) [2024-11-19 21:35:31,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 21:35:31,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:35:31,938 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-19 21:35:31,940 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:35:31,992 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 21:35:31,992 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:35:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-19 21:35:32,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481245198] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:35:32,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:35:32,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2024-11-19 21:35:32,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925339458] [2024-11-19 21:35:32,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:35:32,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 21:35:32,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:35:32,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 21:35:32,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-19 21:35:32,095 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) [2024-11-19 21:35:32,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:35:32,264 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2024-11-19 21:35:32,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-19 21:35:32,265 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) Word has length 47 [2024-11-19 21:35:32,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:35:32,266 INFO L225 Difference]: With dead ends: 132 [2024-11-19 21:35:32,266 INFO L226 Difference]: Without dead ends: 122 [2024-11-19 21:35:32,266 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2024-11-19 21:35:32,268 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 65 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 21:35:32,268 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 101 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 21:35:32,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-19 21:35:32,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2024-11-19 21:35:32,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 74 states have internal predecessors, (76), 17 states have call successors, (17), 11 states have call predecessors, (17), 10 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-19 21:35:32,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2024-11-19 21:35:32,295 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 47 [2024-11-19 21:35:32,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:35:32,295 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2024-11-19 21:35:32,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) [2024-11-19 21:35:32,296 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2024-11-19 21:35:32,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-19 21:35:32,298 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:35:32,298 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:35:32,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 21:35:32,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:35:32,499 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:35:32,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:35:32,500 INFO L85 PathProgramCache]: Analyzing trace with hash 348710830, now seen corresponding path program 2 times [2024-11-19 21:35:32,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:35:32,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218865153] [2024-11-19 21:35:32,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:35:32,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:35:32,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:35:32,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [850724800] [2024-11-19 21:35:32,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 21:35:32,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:35:32,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:35:32,520 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:35:32,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 21:35:32,558 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 21:35:32,559 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:35:32,559 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-19 21:35:32,561 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:35:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-19 21:35:32,748 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:35:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-19 21:35:32,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:35:32,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218865153] [2024-11-19 21:35:32,974 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 21:35:32,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850724800] [2024-11-19 21:35:32,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850724800] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:35:32,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 21:35:32,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2024-11-19 21:35:32,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859789613] [2024-11-19 21:35:32,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 21:35:32,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 21:35:32,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:35:32,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 21:35:32,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2024-11-19 21:35:32,975 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand has 20 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-19 21:35:33,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:35:33,304 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2024-11-19 21:35:33,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-19 21:35:33,305 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 53 [2024-11-19 21:35:33,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:35:33,305 INFO L225 Difference]: With dead ends: 103 [2024-11-19 21:35:33,305 INFO L226 Difference]: Without dead ends: 92 [2024-11-19 21:35:33,306 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2024-11-19 21:35:33,306 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 21:35:33,307 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 281 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 21:35:33,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-19 21:35:33,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2024-11-19 21:35:33,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-19 21:35:33,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2024-11-19 21:35:33,323 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 53 [2024-11-19 21:35:33,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:35:33,323 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2024-11-19 21:35:33,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-19 21:35:33,323 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2024-11-19 21:35:33,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-19 21:35:33,324 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:35:33,324 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:35:33,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-19 21:35:33,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:35:33,525 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:35:33,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:35:33,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1207691024, now seen corresponding path program 3 times [2024-11-19 21:35:33,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:35:33,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120695084] [2024-11-19 21:35:33,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:35:33,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:35:33,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:35:33,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82968645] [2024-11-19 21:35:33,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 21:35:33,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:35:33,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:35:33,575 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:35:33,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 21:35:33,694 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-19 21:35:33,694 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:35:33,695 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-19 21:35:33,698 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:35:33,956 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 45 proven. 187 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-19 21:35:33,956 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:35:42,079 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (= (+ |c_ULTIMATE.start_main_~y~0#1| .cse0) (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 7) .cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))))) is different from false [2024-11-19 21:35:54,130 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 4 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-19 21:36:06,148 WARN L286 SmtUtils]: Spent 8.00s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-19 21:36:14,170 WARN L873 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_26| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39|))) (or (= (+ |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_26| (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_26|)) (+ |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| .cse0)) (= (mod (+ .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| 7) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| 10) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| 6)) 12) 0))))) is different from true [2024-11-19 21:36:26,198 WARN L286 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-19 21:36:42,779 WARN L286 SmtUtils]: Spent 8.56s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-19 21:36:50,792 WARN L873 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0) (forall ((|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_26| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39|))) (or (= (+ |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_26| (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_26|)) (+ |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| .cse0)) (= (mod (+ .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| 7) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| 10) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| 6)) 12) 0))))) is different from true [2024-11-19 21:37:06,925 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 7) .cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))) (= (+ .cse0 (* |c_ULTIMATE.start_main_~y~0#1| 2)) (+ (* |c_ULTIMATE.start_main_~c~0#1| 2) (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|))))) is different from false