./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound50.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 c54d9189042c7bc9bae976b882c7c0538c4797366038f58e7e5d207abe4f931e --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-08 14:42:02,087 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 14:42:02,159 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 14:42:02,187 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 14:42:02,188 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 14:42:02,235 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 14:42:02,236 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 14:42:02,236 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 14:42:02,237 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 14:42:02,240 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 14:42:02,240 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 14:42:02,240 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 14:42:02,241 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 14:42:02,241 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 14:42:02,241 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 14:42:02,242 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 14:42:02,243 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 14:42:02,246 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 14:42:02,246 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 14:42:02,247 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 14:42:02,247 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 14:42:02,248 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 14:42:02,248 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 14:42:02,248 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 14:42:02,248 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 14:42:02,248 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 14:42:02,249 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 14:42:02,249 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 14:42:02,249 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 14:42:02,249 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 14:42:02,250 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 14:42:02,250 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 14:42:02,250 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 14:42:02,250 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 14:42:02,251 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 14:42:02,251 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 14:42:02,251 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 14:42:02,252 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 14:42:02,252 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 14:42:02,252 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 14:42:02,252 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 14:42:02,252 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 14:42:02,253 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c54d9189042c7bc9bae976b882c7c0538c4797366038f58e7e5d207abe4f931e [2024-11-08 14:42:02,441 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 14:42:02,456 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 14:42:02,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 14:42:02,460 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 14:42:02,460 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 14:42:02,461 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound50.c [2024-11-08 14:42:03,932 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 14:42:04,089 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 14:42:04,090 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound50.c [2024-11-08 14:42:04,096 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6aa104c08/2604d4885b1b4b599463f66689d02565/FLAG79822ad55 [2024-11-08 14:42:04,498 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6aa104c08/2604d4885b1b4b599463f66689d02565 [2024-11-08 14:42:04,501 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 14:42:04,502 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 14:42:04,503 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 14:42:04,503 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 14:42:04,507 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 14:42:04,508 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 02:42:04" (1/1) ... [2024-11-08 14:42:04,509 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b00345e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:42:04, skipping insertion in model container [2024-11-08 14:42:04,509 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 02:42:04" (1/1) ... [2024-11-08 14:42:04,527 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 14:42:04,680 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/prodbin-ll_unwindbound50.c[1263,1276] [2024-11-08 14:42:04,693 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 14:42:04,700 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 14:42:04,709 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/prodbin-ll_unwindbound50.c[1263,1276] [2024-11-08 14:42:04,712 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 14:42:04,725 INFO L204 MainTranslator]: Completed translation [2024-11-08 14:42:04,726 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:42:04 WrapperNode [2024-11-08 14:42:04,726 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 14:42:04,727 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 14:42:04,727 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 14:42:04,727 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 14:42:04,732 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:42:04" (1/1) ... [2024-11-08 14:42:04,737 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:42:04" (1/1) ... [2024-11-08 14:42:04,750 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 49 [2024-11-08 14:42:04,750 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 14:42:04,751 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 14:42:04,751 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 14:42:04,751 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 14:42:04,758 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:42:04" (1/1) ... [2024-11-08 14:42:04,759 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:42:04" (1/1) ... [2024-11-08 14:42:04,760 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:42:04" (1/1) ... [2024-11-08 14:42:04,768 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]. [2024-11-08 14:42:04,769 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:42:04" (1/1) ... [2024-11-08 14:42:04,769 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:42:04" (1/1) ... [2024-11-08 14:42:04,771 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:42:04" (1/1) ... [2024-11-08 14:42:04,773 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:42:04" (1/1) ... [2024-11-08 14:42:04,774 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:42:04" (1/1) ... [2024-11-08 14:42:04,774 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:42:04" (1/1) ... [2024-11-08 14:42:04,775 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 14:42:04,776 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 14:42:04,776 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 14:42:04,776 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 14:42:04,777 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:42:04" (1/1) ... [2024-11-08 14:42:04,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 14:42:04,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:42:04,816 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) [2024-11-08 14:42:04,819 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 [2024-11-08 14:42:04,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 14:42:04,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 14:42:04,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 14:42:04,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 14:42:04,864 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-08 14:42:04,864 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-08 14:42:04,916 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 14:42:04,919 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 14:42:05,045 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-08 14:42:05,045 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 14:42:05,057 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 14:42:05,057 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-08 14:42:05,058 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 02:42:05 BoogieIcfgContainer [2024-11-08 14:42:05,058 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 14:42:05,059 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 14:42:05,059 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 14:42:05,062 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 14:42:05,063 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 02:42:04" (1/3) ... [2024-11-08 14:42:05,064 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47667e40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 02:42:05, skipping insertion in model container [2024-11-08 14:42:05,064 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:42:04" (2/3) ... [2024-11-08 14:42:05,065 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47667e40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 02:42:05, skipping insertion in model container [2024-11-08 14:42:05,065 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 02:42:05" (3/3) ... [2024-11-08 14:42:05,067 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound50.c [2024-11-08 14:42:05,081 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 14:42:05,081 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 14:42:05,134 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 14:42:05,139 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;@6ff86329, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 14:42:05,139 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 14:42:05,142 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 14:42:05,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-08 14:42:05,149 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:42:05,149 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:42:05,150 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:42:05,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:42:05,153 INFO L85 PathProgramCache]: Analyzing trace with hash -572597424, now seen corresponding path program 1 times [2024-11-08 14:42:05,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:42:05,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249188758] [2024-11-08 14:42:05,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:42:05,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:42:05,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:42:05,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:42:05,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:42:05,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249188758] [2024-11-08 14:42:05,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249188758] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:42:05,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:42:05,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 14:42:05,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978094459] [2024-11-08 14:42:05,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:42:05,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-08 14:42:05,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:42:05,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-08 14:42:05,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 14:42:05,332 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) 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) [2024-11-08 14:42:05,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:42:05,347 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2024-11-08 14:42:05,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-08 14:42:05,349 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 [2024-11-08 14:42:05,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:42:05,357 INFO L225 Difference]: With dead ends: 39 [2024-11-08 14:42:05,357 INFO L226 Difference]: Without dead ends: 17 [2024-11-08 14:42:05,359 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 [2024-11-08 14:42:05,362 INFO L432 NwaCegarLoop]: 24 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, 24 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 [2024-11-08 14:42:05,364 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:42:05,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-08 14:42:05,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-08 14:42:05,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-08 14:42:05,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2024-11-08 14:42:05,405 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 9 [2024-11-08 14:42:05,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:42:05,406 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2024-11-08 14:42:05,409 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) [2024-11-08 14:42:05,410 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2024-11-08 14:42:05,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-08 14:42:05,410 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:42:05,410 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:42:05,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 14:42:05,411 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:42:05,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:42:05,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1986366499, now seen corresponding path program 1 times [2024-11-08 14:42:05,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:42:05,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512045847] [2024-11-08 14:42:05,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:42:05,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:42:05,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:42:05,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:42:05,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:42:05,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512045847] [2024-11-08 14:42:05,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512045847] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:42:05,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:42:05,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 14:42:05,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618409632] [2024-11-08 14:42:05,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:42:05,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 14:42:05,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:42:05,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 14:42:05,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 14:42:05,523 INFO L87 Difference]: Start difference. First operand 17 states and 20 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) [2024-11-08 14:42:05,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:42:05,535 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2024-11-08 14:42:05,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 14:42:05,536 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 [2024-11-08 14:42:05,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:42:05,536 INFO L225 Difference]: With dead ends: 26 [2024-11-08 14:42:05,536 INFO L226 Difference]: Without dead ends: 19 [2024-11-08 14:42:05,537 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 [2024-11-08 14:42:05,537 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 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 [2024-11-08 14:42:05,538 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:42:05,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-08 14:42:05,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-11-08 14:42:05,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-08 14:42:05,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2024-11-08 14:42:05,541 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 10 [2024-11-08 14:42:05,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:42:05,542 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2024-11-08 14:42:05,542 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) [2024-11-08 14:42:05,542 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2024-11-08 14:42:05,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-08 14:42:05,542 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:42:05,542 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:42:05,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 14:42:05,543 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:42:05,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:42:05,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1984579039, now seen corresponding path program 1 times [2024-11-08 14:42:05,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:42:05,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989429388] [2024-11-08 14:42:05,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:42:05,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:42:05,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:42:05,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [587920657] [2024-11-08 14:42:05,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:42:05,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:42:05,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:42:05,564 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) [2024-11-08 14:42:05,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 14:42:05,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:42:05,627 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 14:42:05,630 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:42:05,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:42:05,731 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 14:42:05,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:42:05,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989429388] [2024-11-08 14:42:05,731 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:42:05,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587920657] [2024-11-08 14:42:05,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587920657] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:42:05,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:42:05,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 14:42:05,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234535343] [2024-11-08 14:42:05,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:42:05,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 14:42:05,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:42:05,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 14:42:05,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 14:42:05,733 INFO L87 Difference]: Start difference. First operand 19 states and 22 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) [2024-11-08 14:42:05,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:42:05,779 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2024-11-08 14:42:05,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 14:42:05,779 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 [2024-11-08 14:42:05,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:42:05,780 INFO L225 Difference]: With dead ends: 29 [2024-11-08 14:42:05,780 INFO L226 Difference]: Without dead ends: 27 [2024-11-08 14:42:05,781 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 [2024-11-08 14:42:05,781 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 5 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:42:05,782 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 48 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:42:05,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-08 14:42:05,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2024-11-08 14:42:05,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 14:42:05,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-11-08 14:42:05,786 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 10 [2024-11-08 14:42:05,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:42:05,786 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-11-08 14:42:05,786 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) [2024-11-08 14:42:05,787 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-11-08 14:42:05,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-08 14:42:05,787 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:42:05,787 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:42:05,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 14:42:05,991 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 [2024-11-08 14:42:05,992 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:42:05,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:42:05,992 INFO L85 PathProgramCache]: Analyzing trace with hash 845350648, now seen corresponding path program 1 times [2024-11-08 14:42:05,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:42:05,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233251943] [2024-11-08 14:42:05,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:42:05,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:42:06,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:42:06,109 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-08 14:42:06,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:42:06,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:42:06,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:42:06,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233251943] [2024-11-08 14:42:06,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233251943] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:42:06,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:42:06,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 14:42:06,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714986848] [2024-11-08 14:42:06,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:42:06,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 14:42:06,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:42:06,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 14:42:06,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 14:42:06,123 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 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) [2024-11-08 14:42:06,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:42:06,152 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2024-11-08 14:42:06,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 14:42:06,152 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 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 16 [2024-11-08 14:42:06,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:42:06,154 INFO L225 Difference]: With dead ends: 34 [2024-11-08 14:42:06,154 INFO L226 Difference]: Without dead ends: 27 [2024-11-08 14:42:06,154 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-08 14:42:06,155 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 16 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:42:06,156 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 43 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:42:06,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-08 14:42:06,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2024-11-08 14:42:06,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 14:42:06,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2024-11-08 14:42:06,164 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2024-11-08 14:42:06,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:42:06,164 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2024-11-08 14:42:06,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 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) [2024-11-08 14:42:06,164 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2024-11-08 14:42:06,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-08 14:42:06,166 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:42:06,167 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:42:06,167 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-08 14:42:06,167 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:42:06,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:42:06,167 INFO L85 PathProgramCache]: Analyzing trace with hash 905454657, now seen corresponding path program 1 times [2024-11-08 14:42:06,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:42:06,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197400597] [2024-11-08 14:42:06,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:42:06,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:42:06,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:42:06,254 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-08 14:42:06,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:42:06,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:42:06,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:42:06,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197400597] [2024-11-08 14:42:06,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197400597] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:42:06,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462467235] [2024-11-08 14:42:06,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:42:06,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:42:06,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:42:06,262 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) [2024-11-08 14:42:06,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 14:42:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:42:06,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-08 14:42:06,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:42:06,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:42:06,345 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:42:06,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:42:06,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462467235] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:42:06,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:42:06,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2024-11-08 14:42:06,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745765187] [2024-11-08 14:42:06,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:42:06,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 14:42:06,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:42:06,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 14:42:06,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-08 14:42:06,399 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 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) [2024-11-08 14:42:06,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:42:06,480 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2024-11-08 14:42:06,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 14:42:06,481 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 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 20 [2024-11-08 14:42:06,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:42:06,482 INFO L225 Difference]: With dead ends: 62 [2024-11-08 14:42:06,482 INFO L226 Difference]: Without dead ends: 55 [2024-11-08 14:42:06,482 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-08 14:42:06,483 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:42:06,483 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 80 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:42:06,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-08 14:42:06,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2024-11-08 14:42:06,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 42 states have internal predecessors, (50), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-08 14:42:06,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2024-11-08 14:42:06,493 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 20 [2024-11-08 14:42:06,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:42:06,493 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2024-11-08 14:42:06,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 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) [2024-11-08 14:42:06,493 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2024-11-08 14:42:06,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-08 14:42:06,494 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:42:06,494 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:42:06,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-08 14:42:06,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:42:06,698 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:42:06,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:42:06,698 INFO L85 PathProgramCache]: Analyzing trace with hash 907242117, now seen corresponding path program 1 times [2024-11-08 14:42:06,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:42:06,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278258390] [2024-11-08 14:42:06,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:42:06,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:42:06,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:42:06,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1065473017] [2024-11-08 14:42:06,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:42:06,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:42:06,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:42:06,744 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) [2024-11-08 14:42:06,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 14:42:06,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:42:06,782 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-08 14:42:06,784 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:42:07,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:42:07,252 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:42:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:42:09,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:42:09,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278258390] [2024-11-08 14:42:09,108 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:42:09,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065473017] [2024-11-08 14:42:09,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065473017] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 14:42:09,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 14:42:09,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2024-11-08 14:42:09,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083872045] [2024-11-08 14:42:09,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:42:09,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 14:42:09,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:42:09,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 14:42:09,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-11-08 14:42:09,110 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 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) [2024-11-08 14:42:09,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:42:09,229 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2024-11-08 14:42:09,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 14:42:09,230 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 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 20 [2024-11-08 14:42:09,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:42:09,231 INFO L225 Difference]: With dead ends: 90 [2024-11-08 14:42:09,231 INFO L226 Difference]: Without dead ends: 88 [2024-11-08 14:42:09,232 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-11-08 14:42:09,232 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:42:09,233 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 59 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:42:09,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-08 14:42:09,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2024-11-08 14:42:09,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 66 states have (on average 1.2727272727272727) internal successors, (84), 69 states have internal predecessors, (84), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-08 14:42:09,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2024-11-08 14:42:09,246 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 20 [2024-11-08 14:42:09,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:42:09,246 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2024-11-08 14:42:09,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 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) [2024-11-08 14:42:09,246 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2024-11-08 14:42:09,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-08 14:42:09,247 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:42:09,247 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:42:09,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 14:42:09,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:42:09,448 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:42:09,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:42:09,448 INFO L85 PathProgramCache]: Analyzing trace with hash 97895491, now seen corresponding path program 1 times [2024-11-08 14:42:09,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:42:09,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60309790] [2024-11-08 14:42:09,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:42:09,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:42:09,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:42:09,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [188223834] [2024-11-08 14:42:09,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:42:09,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:42:09,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:42:09,474 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) [2024-11-08 14:42:09,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 14:42:09,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:42:09,514 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-08 14:42:09,515 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:42:09,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:42:09,687 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:42:10,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:42:10,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:42:10,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60309790] [2024-11-08 14:42:10,013 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:42:10,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188223834] [2024-11-08 14:42:10,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188223834] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:42:10,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 14:42:10,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2024-11-08 14:42:10,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890971803] [2024-11-08 14:42:10,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 14:42:10,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 14:42:10,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:42:10,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 14:42:10,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-08 14:42:10,015 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 14:42:10,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:42:10,366 INFO L93 Difference]: Finished difference Result 127 states and 153 transitions. [2024-11-08 14:42:10,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 14:42:10,367 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2024-11-08 14:42:10,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:42:10,370 INFO L225 Difference]: With dead ends: 127 [2024-11-08 14:42:10,371 INFO L226 Difference]: Without dead ends: 118 [2024-11-08 14:42:10,371 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2024-11-08 14:42:10,372 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:42:10,373 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 101 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:42:10,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-08 14:42:10,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 100. [2024-11-08 14:42:10,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 82 states have internal predecessors, (97), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-08 14:42:10,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 118 transitions. [2024-11-08 14:42:10,398 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 118 transitions. Word has length 20 [2024-11-08 14:42:10,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:42:10,398 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 118 transitions. [2024-11-08 14:42:10,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 14:42:10,398 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 118 transitions. [2024-11-08 14:42:10,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-08 14:42:10,399 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:42:10,399 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:42:10,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 14:42:10,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:42:10,604 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:42:10,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:42:10,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1470880860, now seen corresponding path program 1 times [2024-11-08 14:42:10,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:42:10,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87538744] [2024-11-08 14:42:10,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:42:10,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:42:10,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:42:10,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2082352242] [2024-11-08 14:42:10,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:42:10,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:42:10,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:42:10,634 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) [2024-11-08 14:42:10,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 14:42:10,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:42:10,679 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 14:42:10,680 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:42:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 14:42:10,731 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:42:10,787 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 14:42:10,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:42:10,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87538744] [2024-11-08 14:42:10,788 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:42:10,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082352242] [2024-11-08 14:42:10,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082352242] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:42:10,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 14:42:10,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2024-11-08 14:42:10,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525955812] [2024-11-08 14:42:10,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 14:42:10,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-08 14:42:10,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:42:10,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-08 14:42:10,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-08 14:42:10,790 INFO L87 Difference]: Start difference. First operand 100 states and 118 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 14:42:10,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:42:10,845 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2024-11-08 14:42:10,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 14:42:10,845 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2024-11-08 14:42:10,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:42:10,847 INFO L225 Difference]: With dead ends: 114 [2024-11-08 14:42:10,847 INFO L226 Difference]: Without dead ends: 99 [2024-11-08 14:42:10,847 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-11-08 14:42:10,848 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:42:10,848 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 74 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:42:10,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-08 14:42:10,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2024-11-08 14:42:10,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 77 states have (on average 1.155844155844156) internal successors, (89), 79 states have internal predecessors, (89), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-08 14:42:10,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 108 transitions. [2024-11-08 14:42:10,865 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 108 transitions. Word has length 26 [2024-11-08 14:42:10,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:42:10,865 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 108 transitions. [2024-11-08 14:42:10,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 14:42:10,866 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 108 transitions. [2024-11-08 14:42:10,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-08 14:42:10,866 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:42:10,866 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:42:10,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 14:42:11,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:42:11,067 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:42:11,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:42:11,067 INFO L85 PathProgramCache]: Analyzing trace with hash 103630759, now seen corresponding path program 1 times [2024-11-08 14:42:11,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:42:11,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793884301] [2024-11-08 14:42:11,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:42:11,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:42:11,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:42:11,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2030244776] [2024-11-08 14:42:11,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:42:11,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:42:11,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:42:11,085 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) [2024-11-08 14:42:11,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 14:42:11,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:42:11,133 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-08 14:42:11,134 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:42:11,488 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 14:42:11,488 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:42:15,727 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 14:42:15,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:42:15,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793884301] [2024-11-08 14:42:15,730 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:42:15,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030244776] [2024-11-08 14:42:15,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030244776] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:42:15,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 14:42:15,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2024-11-08 14:42:15,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119253531] [2024-11-08 14:42:15,731 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 14:42:15,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 14:42:15,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:42:15,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 14:42:15,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2024-11-08 14:42:15,732 INFO L87 Difference]: Start difference. First operand 96 states and 108 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-08 14:42:20,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:42:20,988 INFO L93 Difference]: Finished difference Result 137 states and 155 transitions. [2024-11-08 14:42:20,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-08 14:42:20,989 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 30 [2024-11-08 14:42:20,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:42:20,990 INFO L225 Difference]: With dead ends: 137 [2024-11-08 14:42:20,990 INFO L226 Difference]: Without dead ends: 135 [2024-11-08 14:42:20,990 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2024-11-08 14:42:20,991 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 27 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 14:42:20,991 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 216 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 14:42:20,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-08 14:42:21,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 125. [2024-11-08 14:42:21,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 103 states have internal predecessors, (117), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-08 14:42:21,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 142 transitions. [2024-11-08 14:42:21,017 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 142 transitions. Word has length 30 [2024-11-08 14:42:21,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:42:21,018 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 142 transitions. [2024-11-08 14:42:21,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-08 14:42:21,018 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 142 transitions. [2024-11-08 14:42:21,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-08 14:42:21,020 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:42:21,021 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:42:21,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-08 14:42:21,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:42:21,225 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:42:21,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:42:21,225 INFO L85 PathProgramCache]: Analyzing trace with hash -957536403, now seen corresponding path program 2 times [2024-11-08 14:42:21,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:42:21,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142981780] [2024-11-08 14:42:21,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:42:21,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:42:21,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:42:21,406 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-08 14:42:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:42:21,411 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-08 14:42:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:42:21,415 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-11-08 14:42:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:42:21,419 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-08 14:42:21,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:42:21,425 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-08 14:42:21,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:42:21,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142981780] [2024-11-08 14:42:21,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142981780] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:42:21,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844647340] [2024-11-08 14:42:21,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 14:42:21,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:42:21,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:42:21,429 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) [2024-11-08 14:42:21,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 14:42:21,480 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 14:42:21,480 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 14:42:21,481 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-08 14:42:21,482 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:42:21,528 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:42:21,528 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:42:21,647 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-08 14:42:21,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844647340] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:42:21,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:42:21,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2024-11-08 14:42:21,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166133494] [2024-11-08 14:42:21,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:42:21,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 14:42:21,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:42:21,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 14:42:21,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-08 14:42:21,649 INFO L87 Difference]: Start difference. First operand 125 states and 142 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-08 14:42:21,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:42:21,809 INFO L93 Difference]: Finished difference Result 341 states and 405 transitions. [2024-11-08 14:42:21,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-08 14:42:21,809 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 50 [2024-11-08 14:42:21,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:42:21,812 INFO L225 Difference]: With dead ends: 341 [2024-11-08 14:42:21,813 INFO L226 Difference]: Without dead ends: 334 [2024-11-08 14:42:21,813 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2024-11-08 14:42:21,814 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 74 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:42:21,814 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 141 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:42:21,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2024-11-08 14:42:21,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 324. [2024-11-08 14:42:21,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 260 states have (on average 1.15) internal successors, (299), 267 states have internal predecessors, (299), 36 states have call successors, (36), 27 states have call predecessors, (36), 27 states have return successors, (35), 29 states have call predecessors, (35), 35 states have call successors, (35) [2024-11-08 14:42:21,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 370 transitions. [2024-11-08 14:42:21,843 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 370 transitions. Word has length 50 [2024-11-08 14:42:21,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:42:21,843 INFO L471 AbstractCegarLoop]: Abstraction has 324 states and 370 transitions. [2024-11-08 14:42:21,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-08 14:42:21,844 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 370 transitions. [2024-11-08 14:42:21,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-08 14:42:21,845 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:42:21,845 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-08 14:42:21,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 14:42:22,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:42:22,050 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:42:22,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:42:22,050 INFO L85 PathProgramCache]: Analyzing trace with hash 535727021, now seen corresponding path program 2 times [2024-11-08 14:42:22,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:42:22,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15457775] [2024-11-08 14:42:22,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:42:22,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:42:22,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:42:22,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068405752] [2024-11-08 14:42:22,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 14:42:22,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:42:22,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:42:22,072 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:42:22,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 14:42:22,115 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 14:42:22,116 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 14:42:22,117 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-08 14:42:22,118 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:42:22,822 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 14:42:22,823 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:42:34,557 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 37 proven. 25 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-08 14:42:34,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:42:34,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15457775] [2024-11-08 14:42:34,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:42:34,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068405752] [2024-11-08 14:42:34,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068405752] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:42:34,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 14:42:34,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2024-11-08 14:42:34,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552526382] [2024-11-08 14:42:34,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 14:42:34,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-08 14:42:34,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:42:34,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-08 14:42:34,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2024-11-08 14:42:34,559 INFO L87 Difference]: Start difference. First operand 324 states and 370 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 22 states have internal predecessors, (58), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-08 14:43:01,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:43:01,022 INFO L93 Difference]: Finished difference Result 450 states and 521 transitions. [2024-11-08 14:43:01,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-08 14:43:01,022 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 22 states have internal predecessors, (58), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 50 [2024-11-08 14:43:01,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:43:01,024 INFO L225 Difference]: With dead ends: 450 [2024-11-08 14:43:01,024 INFO L226 Difference]: Without dead ends: 448 [2024-11-08 14:43:01,025 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=243, Invalid=1017, Unknown=0, NotChecked=0, Total=1260 [2024-11-08 14:43:01,025 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2024-11-08 14:43:01,026 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 297 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2024-11-08 14:43:01,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2024-11-08 14:43:01,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 443. [2024-11-08 14:43:01,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 356 states have (on average 1.146067415730337) internal successors, (408), 366 states have internal predecessors, (408), 51 states have call successors, (51), 35 states have call predecessors, (51), 35 states have return successors, (50), 41 states have call predecessors, (50), 50 states have call successors, (50) [2024-11-08 14:43:01,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 509 transitions. [2024-11-08 14:43:01,069 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 509 transitions. Word has length 50 [2024-11-08 14:43:01,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:43:01,069 INFO L471 AbstractCegarLoop]: Abstraction has 443 states and 509 transitions. [2024-11-08 14:43:01,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 22 states have internal predecessors, (58), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-08 14:43:01,070 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 509 transitions. [2024-11-08 14:43:01,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-08 14:43:01,071 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:43:01,071 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2024-11-08 14:43:01,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-08 14:43:01,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-08 14:43:01,275 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:43:01,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:43:01,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1003105367, now seen corresponding path program 2 times [2024-11-08 14:43:01,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:43:01,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080894449] [2024-11-08 14:43:01,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:43:01,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:43:01,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:43:01,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109567038] [2024-11-08 14:43:01,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 14:43:01,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:43:01,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:43:01,312 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:43:01,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 14:43:01,356 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 14:43:01,357 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 14:43:01,357 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-08 14:43:01,359 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:43:02,123 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 18 proven. 50 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 14:43:02,124 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:43:03,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:43:03,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080894449] [2024-11-08 14:43:03,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:43:03,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109567038] [2024-11-08 14:43:03,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109567038] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:43:03,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 14:43:03,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-11-08 14:43:03,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451034818] [2024-11-08 14:43:03,646 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 14:43:03,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-08 14:43:03,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:43:03,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-08 14:43:03,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2024-11-08 14:43:03,647 INFO L87 Difference]: Start difference. First operand 443 states and 509 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-08 14:43:04,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:43:04,032 INFO L93 Difference]: Finished difference Result 445 states and 510 transitions. [2024-11-08 14:43:04,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-08 14:43:04,032 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 50 [2024-11-08 14:43:04,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:43:04,034 INFO L225 Difference]: With dead ends: 445 [2024-11-08 14:43:04,034 INFO L226 Difference]: Without dead ends: 443 [2024-11-08 14:43:04,035 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2024-11-08 14:43:04,035 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 14:43:04,035 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 242 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 14:43:04,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2024-11-08 14:43:04,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 443. [2024-11-08 14:43:04,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 356 states have (on average 1.1432584269662922) internal successors, (407), 366 states have internal predecessors, (407), 51 states have call successors, (51), 35 states have call predecessors, (51), 35 states have return successors, (50), 41 states have call predecessors, (50), 50 states have call successors, (50) [2024-11-08 14:43:04,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 508 transitions. [2024-11-08 14:43:04,070 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 508 transitions. Word has length 50 [2024-11-08 14:43:04,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:43:04,071 INFO L471 AbstractCegarLoop]: Abstraction has 443 states and 508 transitions. [2024-11-08 14:43:04,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-08 14:43:04,071 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 508 transitions. [2024-11-08 14:43:04,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-08 14:43:04,072 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:43:04,072 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2024-11-08 14:43:04,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-08 14:43:04,276 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:43:04,277 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:43:04,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:43:04,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1891003445, now seen corresponding path program 3 times [2024-11-08 14:43:04,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:43:04,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771912326] [2024-11-08 14:43:04,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:43:04,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:43:04,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:43:04,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582785442] [2024-11-08 14:43:04,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 14:43:04,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:43:04,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:43:04,313 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:43:04,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 14:43:04,407 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-08 14:43:04,407 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 14:43:04,411 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-08 14:43:04,413 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:43:11,053 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 10 proven. 75 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-08 14:43:11,053 INFO L311 TraceCheckSpWp]: Computing backward predicates...