./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8be7027f 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/divbin_unwindbound50.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 462bdab67ac93ddd789186f30bfdfc189629d2959c27ec219da5960b800d2042 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-11 20:01:38,217 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-11 20:01:38,271 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-11 20:01:38,277 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-11 20:01:38,278 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-11 20:01:38,303 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-11 20:01:38,304 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-11 20:01:38,304 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-11 20:01:38,305 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-11 20:01:38,306 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-11 20:01:38,306 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-11 20:01:38,306 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-11 20:01:38,307 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-11 20:01:38,307 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-11 20:01:38,307 INFO L153 SettingsManager]: * Use SBE=true [2024-11-11 20:01:38,309 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-11 20:01:38,309 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-11 20:01:38,309 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-11 20:01:38,310 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-11 20:01:38,310 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-11 20:01:38,312 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-11 20:01:38,313 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-11 20:01:38,313 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-11 20:01:38,313 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-11 20:01:38,313 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-11 20:01:38,314 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-11 20:01:38,314 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-11 20:01:38,314 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-11 20:01:38,314 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-11 20:01:38,314 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-11 20:01:38,315 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-11 20:01:38,315 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-11 20:01:38,315 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 20:01:38,315 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-11 20:01:38,315 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-11 20:01:38,315 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-11 20:01:38,315 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-11 20:01:38,316 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-11 20:01:38,316 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-11 20:01:38,316 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-11 20:01:38,316 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-11 20:01:38,317 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-11 20:01:38,317 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 462bdab67ac93ddd789186f30bfdfc189629d2959c27ec219da5960b800d2042 [2024-11-11 20:01:38,511 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-11 20:01:38,526 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-11 20:01:38,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-11 20:01:38,529 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-11 20:01:38,529 INFO L274 PluginConnector]: CDTParser initialized [2024-11-11 20:01:38,530 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i [2024-11-11 20:01:39,846 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-11 20:01:40,011 INFO L384 CDTParser]: Found 1 translation units. [2024-11-11 20:01:40,011 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i [2024-11-11 20:01:40,018 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfe6b98f6/bc4a11939e334527b2df689e7a1d0b27/FLAGf0746f24e [2024-11-11 20:01:40,414 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfe6b98f6/bc4a11939e334527b2df689e7a1d0b27 [2024-11-11 20:01:40,416 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-11 20:01:40,417 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-11 20:01:40,421 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-11 20:01:40,421 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-11 20:01:40,425 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-11 20:01:40,425 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 08:01:40" (1/1) ... [2024-11-11 20:01:40,426 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4290f0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:01:40, skipping insertion in model container [2024-11-11 20:01:40,426 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 08:01:40" (1/1) ... [2024-11-11 20:01:40,440 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-11 20:01:40,601 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/divbin_unwindbound50.i[950,963] [2024-11-11 20:01:40,620 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 20:01:40,631 INFO L200 MainTranslator]: Completed pre-run [2024-11-11 20:01:40,644 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/divbin_unwindbound50.i[950,963] [2024-11-11 20:01:40,649 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 20:01:40,667 INFO L204 MainTranslator]: Completed translation [2024-11-11 20:01:40,668 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:01:40 WrapperNode [2024-11-11 20:01:40,668 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-11 20:01:40,669 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-11 20:01:40,670 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-11 20:01:40,670 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-11 20:01:40,676 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:01:40" (1/1) ... [2024-11-11 20:01:40,683 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:01:40" (1/1) ... [2024-11-11 20:01:40,699 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2024-11-11 20:01:40,700 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-11 20:01:40,701 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-11 20:01:40,701 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-11 20:01:40,701 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-11 20:01:40,710 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:01:40" (1/1) ... [2024-11-11 20:01:40,711 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:01:40" (1/1) ... [2024-11-11 20:01:40,712 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:01:40" (1/1) ... [2024-11-11 20:01:40,722 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]. [2024-11-11 20:01:40,722 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:01:40" (1/1) ... [2024-11-11 20:01:40,723 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:01:40" (1/1) ... [2024-11-11 20:01:40,725 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:01:40" (1/1) ... [2024-11-11 20:01:40,728 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:01:40" (1/1) ... [2024-11-11 20:01:40,729 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:01:40" (1/1) ... [2024-11-11 20:01:40,730 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:01:40" (1/1) ... [2024-11-11 20:01:40,731 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-11 20:01:40,732 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-11 20:01:40,732 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-11 20:01:40,732 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-11 20:01:40,733 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:01:40" (1/1) ... [2024-11-11 20:01:40,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 20:01:40,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:01:40,769 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) [2024-11-11 20:01:40,775 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 [2024-11-11 20:01:40,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-11 20:01:40,823 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-11 20:01:40,823 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-11 20:01:40,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-11 20:01:40,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-11 20:01:40,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-11 20:01:40,824 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-11 20:01:40,824 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-11 20:01:40,887 INFO L238 CfgBuilder]: Building ICFG [2024-11-11 20:01:40,890 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-11 20:01:41,007 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-11 20:01:41,007 INFO L287 CfgBuilder]: Performing block encoding [2024-11-11 20:01:41,026 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-11 20:01:41,026 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-11 20:01:41,026 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 08:01:41 BoogieIcfgContainer [2024-11-11 20:01:41,026 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-11 20:01:41,029 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-11 20:01:41,029 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-11 20:01:41,032 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-11 20:01:41,032 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 08:01:40" (1/3) ... [2024-11-11 20:01:41,033 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3246e2cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 08:01:41, skipping insertion in model container [2024-11-11 20:01:41,033 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:01:40" (2/3) ... [2024-11-11 20:01:41,035 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3246e2cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 08:01:41, skipping insertion in model container [2024-11-11 20:01:41,035 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 08:01:41" (3/3) ... [2024-11-11 20:01:41,036 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound50.i [2024-11-11 20:01:41,053 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-11 20:01:41,053 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-11 20:01:41,120 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-11 20:01:41,126 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;@34230e69, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-11 20:01:41,126 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-11 20:01:41,129 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-11 20:01:41,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-11 20:01:41,134 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:01:41,135 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:01:41,135 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:01:41,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:01:41,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1267887399, now seen corresponding path program 1 times [2024-11-11 20:01:41,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:01:41,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077090779] [2024-11-11 20:01:41,146 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:01:41,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:01:41,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:01:41,339 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 20:01:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:01:41,355 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 20:01:41,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:01:41,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 20:01:41,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:01:41,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077090779] [2024-11-11 20:01:41,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077090779] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 20:01:41,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 20:01:41,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-11 20:01:41,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358139589] [2024-11-11 20:01:41,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 20:01:41,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-11 20:01:41,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:01:41,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-11 20:01:41,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-11 20:01:41,403 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-11 20:01:41,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:01:41,425 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2024-11-11 20:01:41,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-11 20:01:41,428 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2024-11-11 20:01:41,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:01:41,435 INFO L225 Difference]: With dead ends: 53 [2024-11-11 20:01:41,435 INFO L226 Difference]: Without dead ends: 24 [2024-11-11 20:01:41,438 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-11 20:01:41,442 INFO L435 NwaCegarLoop]: 34 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, 34 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 [2024-11-11 20:01:41,444 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 20:01:41,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-11 20:01:41,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-11 20:01:41,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-11 20:01:41,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2024-11-11 20:01:41,524 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 19 [2024-11-11 20:01:41,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:01:41,525 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-11-11 20:01:41,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-11 20:01:41,526 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2024-11-11 20:01:41,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-11 20:01:41,530 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:01:41,530 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:01:41,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-11 20:01:41,531 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:01:41,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:01:41,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1485611193, now seen corresponding path program 1 times [2024-11-11 20:01:41,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:01:41,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6426639] [2024-11-11 20:01:41,536 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:01:41,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:01:41,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:01:41,689 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 20:01:41,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:01:41,714 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 20:01:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:01:41,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 20:01:41,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:01:41,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6426639] [2024-11-11 20:01:41,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6426639] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 20:01:41,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 20:01:41,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-11 20:01:41,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628137516] [2024-11-11 20:01:41,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 20:01:41,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-11 20:01:41,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:01:41,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-11 20:01:41,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-11 20:01:41,749 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 20:01:41,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:01:41,779 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2024-11-11 20:01:41,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-11 20:01:41,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2024-11-11 20:01:41,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:01:41,781 INFO L225 Difference]: With dead ends: 38 [2024-11-11 20:01:41,781 INFO L226 Difference]: Without dead ends: 26 [2024-11-11 20:01:41,782 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-11 20:01:41,783 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 5 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 20:01:41,783 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 71 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 20:01:41,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-11 20:01:41,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-11 20:01:41,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-11 20:01:41,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2024-11-11 20:01:41,789 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 21 [2024-11-11 20:01:41,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:01:41,791 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2024-11-11 20:01:41,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 20:01:41,791 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2024-11-11 20:01:41,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-11 20:01:41,792 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:01:41,792 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:01:41,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-11 20:01:41,793 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:01:41,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:01:41,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1580975129, now seen corresponding path program 1 times [2024-11-11 20:01:41,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:01:41,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415831445] [2024-11-11 20:01:41,794 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:01:41,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:01:41,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 20:01:41,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [625952248] [2024-11-11 20:01:41,862 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:01:41,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:01:41,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:01:41,865 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) [2024-11-11 20:01:41,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-11 20:01:41,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:01:41,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-11 20:01:41,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:01:42,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 20:01:42,070 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-11 20:01:42,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:01:42,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415831445] [2024-11-11 20:01:42,072 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 20:01:42,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625952248] [2024-11-11 20:01:42,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625952248] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 20:01:42,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 20:01:42,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-11 20:01:42,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152836591] [2024-11-11 20:01:42,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 20:01:42,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-11 20:01:42,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:01:42,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-11 20:01:42,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-11 20:01:42,079 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 20:01:42,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:01:42,140 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2024-11-11 20:01:42,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-11 20:01:42,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2024-11-11 20:01:42,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:01:42,141 INFO L225 Difference]: With dead ends: 38 [2024-11-11 20:01:42,141 INFO L226 Difference]: Without dead ends: 35 [2024-11-11 20:01:42,142 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-11 20:01:42,143 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 20:01:42,143 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 82 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 20:01:42,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-11 20:01:42,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-11-11 20:01:42,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-11 20:01:42,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2024-11-11 20:01:42,151 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 22 [2024-11-11 20:01:42,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:01:42,152 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2024-11-11 20:01:42,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 20:01:42,152 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2024-11-11 20:01:42,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-11 20:01:42,153 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:01:42,154 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:01:42,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-11 20:01:42,357 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 [2024-11-11 20:01:42,358 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:01:42,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:01:42,358 INFO L85 PathProgramCache]: Analyzing trace with hash -791365823, now seen corresponding path program 1 times [2024-11-11 20:01:42,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:01:42,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774112152] [2024-11-11 20:01:42,359 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:01:42,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:01:42,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:01:42,688 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 20:01:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:01:42,691 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 20:01:42,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:01:42,697 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-11 20:01:42,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:01:42,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 20:01:42,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:01:42,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774112152] [2024-11-11 20:01:42,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774112152] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 20:01:42,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 20:01:42,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-11 20:01:42,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82730759] [2024-11-11 20:01:42,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 20:01:42,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-11 20:01:42,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:01:42,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-11 20:01:42,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-11 20:01:42,712 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-11 20:01:42,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:01:42,734 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2024-11-11 20:01:42,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-11 20:01:42,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2024-11-11 20:01:42,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:01:42,736 INFO L225 Difference]: With dead ends: 61 [2024-11-11 20:01:42,737 INFO L226 Difference]: Without dead ends: 36 [2024-11-11 20:01:42,737 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-11 20:01:42,738 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 20:01:42,739 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 20:01:42,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-11 20:01:42,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-11 20:01:42,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-11 20:01:42,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2024-11-11 20:01:42,748 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 31 [2024-11-11 20:01:42,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:01:42,748 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2024-11-11 20:01:42,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-11 20:01:42,749 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2024-11-11 20:01:42,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-11 20:01:42,750 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:01:42,750 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:01:42,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-11 20:01:42,751 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:01:42,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:01:42,751 INFO L85 PathProgramCache]: Analyzing trace with hash 2073553820, now seen corresponding path program 1 times [2024-11-11 20:01:42,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:01:42,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813737342] [2024-11-11 20:01:42,752 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:01:42,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:01:42,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:01:42,821 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 20:01:42,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:01:42,825 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 20:01:42,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:01:42,829 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-11 20:01:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:01:42,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-11 20:01:42,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:01:42,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813737342] [2024-11-11 20:01:42,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813737342] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:01:42,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114736583] [2024-11-11 20:01:42,833 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:01:42,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:01:42,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:01:42,836 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) [2024-11-11 20:01:42,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-11 20:01:42,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:01:42,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-11 20:01:42,908 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:01:42,939 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-11 20:01:42,940 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:01:43,007 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-11 20:01:43,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114736583] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:01:43,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 20:01:43,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2024-11-11 20:01:43,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188602242] [2024-11-11 20:01:43,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 20:01:43,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-11 20:01:43,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:01:43,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-11 20:01:43,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-11 20:01:43,011 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-11 20:01:43,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:01:43,080 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2024-11-11 20:01:43,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-11 20:01:43,081 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 33 [2024-11-11 20:01:43,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:01:43,081 INFO L225 Difference]: With dead ends: 76 [2024-11-11 20:01:43,082 INFO L226 Difference]: Without dead ends: 55 [2024-11-11 20:01:43,082 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-11 20:01:43,083 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 20:01:43,083 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 96 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 20:01:43,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-11 20:01:43,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2024-11-11 20:01:43,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-11 20:01:43,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2024-11-11 20:01:43,096 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 33 [2024-11-11 20:01:43,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:01:43,097 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2024-11-11 20:01:43,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-11 20:01:43,097 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2024-11-11 20:01:43,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-11 20:01:43,099 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:01:43,099 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:01:43,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-11 20:01:43,299 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 [2024-11-11 20:01:43,300 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:01:43,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:01:43,301 INFO L85 PathProgramCache]: Analyzing trace with hash 675416052, now seen corresponding path program 1 times [2024-11-11 20:01:43,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:01:43,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129611108] [2024-11-11 20:01:43,301 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:01:43,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:01:43,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 20:01:43,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [530598029] [2024-11-11 20:01:43,343 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:01:43,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:01:43,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:01:43,345 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) [2024-11-11 20:01:43,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-11 20:01:43,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:01:43,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-11 20:01:43,437 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:01:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 20:01:43,633 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:01:56,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:01:56,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129611108] [2024-11-11 20:01:56,807 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 20:01:56,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530598029] [2024-11-11 20:01:56,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530598029] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:01:56,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-11 20:01:56,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-11-11 20:01:56,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358018590] [2024-11-11 20:01:56,808 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-11 20:01:56,808 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-11 20:01:56,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:01:56,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-11 20:01:56,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=147, Unknown=3, NotChecked=0, Total=182 [2024-11-11 20:01:56,809 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-11 20:01:56,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:01:56,895 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2024-11-11 20:01:56,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-11 20:01:56,896 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2024-11-11 20:01:56,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:01:56,897 INFO L225 Difference]: With dead ends: 55 [2024-11-11 20:01:56,897 INFO L226 Difference]: Without dead ends: 52 [2024-11-11 20:01:56,897 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=38, Invalid=169, Unknown=3, NotChecked=0, Total=210 [2024-11-11 20:01:56,898 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 20:01:56,898 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 136 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 20:01:56,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-11 20:01:56,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-11-11 20:01:56,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 42 states have internal predecessors, (50), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-11 20:01:56,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2024-11-11 20:01:56,903 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 34 [2024-11-11 20:01:56,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:01:56,903 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2024-11-11 20:01:56,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-11 20:01:56,903 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2024-11-11 20:01:56,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-11 20:01:56,904 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:01:56,904 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:01:56,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-11 20:01:57,104 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 [2024-11-11 20:01:57,106 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:01:57,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:01:57,106 INFO L85 PathProgramCache]: Analyzing trace with hash 886516180, now seen corresponding path program 2 times [2024-11-11 20:01:57,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:01:57,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909468762] [2024-11-11 20:01:57,107 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:01:57,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:01:57,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:01:57,539 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 20:01:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:01:57,541 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 20:01:57,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:01:57,545 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-11 20:01:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:01:57,557 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-11-11 20:01:57,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:01:57,564 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-11 20:01:57,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:01:57,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909468762] [2024-11-11 20:01:57,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909468762] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:01:57,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613027461] [2024-11-11 20:01:57,565 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 20:01:57,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:01:57,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:01:57,567 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) [2024-11-11 20:01:57,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-11 20:01:57,649 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 20:01:57,649 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 20:01:57,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-11 20:01:57,652 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:01:58,183 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-11 20:01:58,184 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:01:59,557 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-11 20:01:59,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613027461] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:01:59,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 20:01:59,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14, 15] total 30 [2024-11-11 20:01:59,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847592668] [2024-11-11 20:01:59,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 20:01:59,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-11 20:01:59,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:01:59,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-11 20:01:59,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2024-11-11 20:01:59,561 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 30 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 24 states have internal predecessors, (68), 10 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-11 20:02:00,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:02:00,317 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2024-11-11 20:02:00,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-11 20:02:00,318 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 24 states have internal predecessors, (68), 10 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) Word has length 43 [2024-11-11 20:02:00,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:02:00,322 INFO L225 Difference]: With dead ends: 108 [2024-11-11 20:02:00,322 INFO L226 Difference]: Without dead ends: 62 [2024-11-11 20:02:00,323 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2024-11-11 20:02:00,323 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 45 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-11 20:02:00,323 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 295 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-11 20:02:00,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-11 20:02:00,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2024-11-11 20:02:00,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 42 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-11 20:02:00,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2024-11-11 20:02:00,336 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 43 [2024-11-11 20:02:00,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:02:00,336 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2024-11-11 20:02:00,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 24 states have internal predecessors, (68), 10 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-11 20:02:00,340 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2024-11-11 20:02:00,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-11 20:02:00,341 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:02:00,341 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:02:00,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-11 20:02:00,541 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 [2024-11-11 20:02:00,542 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:02:00,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:02:00,543 INFO L85 PathProgramCache]: Analyzing trace with hash -2006317561, now seen corresponding path program 3 times [2024-11-11 20:02:00,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:02:00,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071292363] [2024-11-11 20:02:00,544 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:02:00,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:02:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 20:02:00,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319612032] [2024-11-11 20:02:00,651 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-11 20:02:00,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:02:00,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:02:00,654 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) [2024-11-11 20:02:00,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-11 20:02:01,335 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-11 20:02:01,336 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 20:02:01,337 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-11 20:02:01,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:02:02,286 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-11 20:02:02,286 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:02:36,560 WARN L286 SmtUtils]: Spent 5.36s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-11 20:02:52,558 WARN L286 SmtUtils]: Spent 6.09s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-11 20:03:17,738 WARN L286 SmtUtils]: Spent 12.59s on a formula simplification that was a NOOP. DAG size: 13 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)