./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.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 7e073a4c36b82f2b6062e496bb836cd3d16667ec7228f4ab2b6689e74fa81265 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 18:47:45,744 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 18:47:45,789 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 18:47:45,795 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 18:47:45,797 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 18:47:45,815 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 18:47:45,816 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 18:47:45,817 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 18:47:45,817 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 18:47:45,820 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 18:47:45,820 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 18:47:45,821 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 18:47:45,821 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 18:47:45,821 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 18:47:45,822 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 18:47:45,822 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 18:47:45,822 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 18:47:45,822 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 18:47:45,822 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 18:47:45,822 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 18:47:45,823 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 18:47:45,824 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 18:47:45,824 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 18:47:45,824 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 18:47:45,824 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 18:47:45,825 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 18:47:45,825 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 18:47:45,825 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 18:47:45,826 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 18:47:45,826 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 18:47:45,826 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 18:47:45,827 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 18:47:45,827 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 18:47:45,827 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 18:47:45,827 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 18:47:45,828 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 18:47:45,828 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 18:47:45,828 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 18:47:45,828 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 18:47:45,829 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 18:47:45,829 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 18:47:45,829 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 18:47:45,829 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e073a4c36b82f2b6062e496bb836cd3d16667ec7228f4ab2b6689e74fa81265 [2024-10-12 18:47:46,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 18:47:46,065 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 18:47:46,068 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 18:47:46,069 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 18:47:46,069 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 18:47:46,070 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i [2024-10-12 18:47:47,401 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 18:47:47,550 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 18:47:47,550 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i [2024-10-12 18:47:47,560 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e996f8339/b41eb8a30ad14980a2619c976060e3a7/FLAG9257574ca [2024-10-12 18:47:47,962 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e996f8339/b41eb8a30ad14980a2619c976060e3a7 [2024-10-12 18:47:47,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 18:47:47,965 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 18:47:47,966 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 18:47:47,966 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 18:47:47,970 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 18:47:47,970 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:47:47" (1/1) ... [2024-10-12 18:47:47,971 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c6a57a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:47:47, skipping insertion in model container [2024-10-12 18:47:47,971 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:47:47" (1/1) ... [2024-10-12 18:47:47,989 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 18:47:48,109 WARN L248 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_unwindbound20.i[950,963] [2024-10-12 18:47:48,122 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 18:47:48,129 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 18:47:48,165 WARN L248 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_unwindbound20.i[950,963] [2024-10-12 18:47:48,175 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 18:47:48,208 INFO L204 MainTranslator]: Completed translation [2024-10-12 18:47:48,215 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:47:48 WrapperNode [2024-10-12 18:47:48,215 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 18:47:48,216 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 18:47:48,217 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 18:47:48,217 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 18:47:48,222 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:47:48" (1/1) ... [2024-10-12 18:47:48,232 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:47:48" (1/1) ... [2024-10-12 18:47:48,243 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2024-10-12 18:47:48,244 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 18:47:48,244 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 18:47:48,244 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 18:47:48,245 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 18:47:48,252 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:47:48" (1/1) ... [2024-10-12 18:47:48,252 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:47:48" (1/1) ... [2024-10-12 18:47:48,253 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:47:48" (1/1) ... [2024-10-12 18:47:48,260 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]. [2024-10-12 18:47:48,260 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:47:48" (1/1) ... [2024-10-12 18:47:48,260 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:47:48" (1/1) ... [2024-10-12 18:47:48,262 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:47:48" (1/1) ... [2024-10-12 18:47:48,267 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:47:48" (1/1) ... [2024-10-12 18:47:48,268 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:47:48" (1/1) ... [2024-10-12 18:47:48,273 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:47:48" (1/1) ... [2024-10-12 18:47:48,274 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 18:47:48,275 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 18:47:48,275 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 18:47:48,275 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 18:47:48,276 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:47:48" (1/1) ... [2024-10-12 18:47:48,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 18:47:48,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:47:48,304 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) [2024-10-12 18:47:48,306 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 [2024-10-12 18:47:48,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 18:47:48,341 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-12 18:47:48,341 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-12 18:47:48,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 18:47:48,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 18:47:48,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 18:47:48,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-12 18:47:48,342 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-12 18:47:48,388 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 18:47:48,389 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 18:47:48,532 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-10-12 18:47:48,532 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 18:47:48,551 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 18:47:48,552 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-12 18:47:48,552 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:47:48 BoogieIcfgContainer [2024-10-12 18:47:48,552 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 18:47:48,554 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 18:47:48,554 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 18:47:48,556 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 18:47:48,556 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 06:47:47" (1/3) ... [2024-10-12 18:47:48,557 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58bc1d0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:47:48, skipping insertion in model container [2024-10-12 18:47:48,557 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:47:48" (2/3) ... [2024-10-12 18:47:48,557 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58bc1d0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:47:48, skipping insertion in model container [2024-10-12 18:47:48,557 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:47:48" (3/3) ... [2024-10-12 18:47:48,558 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound20.i [2024-10-12 18:47:48,575 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 18:47:48,575 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 18:47:48,636 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 18:47:48,643 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;@6a429c1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 18:47:48,644 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 18:47:48,649 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 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) [2024-10-12 18:47:48,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-12 18:47:48,657 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:47:48,657 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:47:48,658 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:47:48,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:47:48,663 INFO L85 PathProgramCache]: Analyzing trace with hash -627064806, now seen corresponding path program 1 times [2024-10-12 18:47:48,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:47:48,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068558060] [2024-10-12 18:47:48,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:47:48,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:47:48,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:47:48,816 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:47:48,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:47:48,828 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 18:47:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:47:48,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 18:47:48,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:47:48,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068558060] [2024-10-12 18:47:48,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068558060] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:47:48,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:47:48,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 18:47:48,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114911499] [2024-10-12 18:47:48,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:47:48,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-12 18:47:48,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:47:48,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-12 18:47:48,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 18:47:48,867 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 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 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2024-10-12 18:47:48,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:47:48,890 INFO L93 Difference]: Finished difference Result 48 states and 71 transitions. [2024-10-12 18:47:48,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-12 18:47:48,892 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 18 [2024-10-12 18:47:48,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:47:48,901 INFO L225 Difference]: With dead ends: 48 [2024-10-12 18:47:48,901 INFO L226 Difference]: Without dead ends: 23 [2024-10-12 18:47:48,905 INFO L431 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 [2024-10-12 18:47:48,911 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:47:48,912 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:47:48,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-12 18:47:48,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-10-12 18:47:48,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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) [2024-10-12 18:47:48,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2024-10-12 18:47:48,943 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 18 [2024-10-12 18:47:48,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:47:48,944 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2024-10-12 18:47:48,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2024-10-12 18:47:48,944 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2024-10-12 18:47:48,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-12 18:47:48,945 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:47:48,945 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:47:48,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 18:47:48,946 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:47:48,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:47:48,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1502675692, now seen corresponding path program 1 times [2024-10-12 18:47:48,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:47:48,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063164786] [2024-10-12 18:47:48,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:47:48,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:47:48,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:47:49,096 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:47:49,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:47:49,113 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 18:47:49,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:47:49,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 18:47:49,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:47:49,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063164786] [2024-10-12 18:47:49,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063164786] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:47:49,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:47:49,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-12 18:47:49,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267183224] [2024-10-12 18:47:49,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:47:49,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-12 18:47:49,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:47:49,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-12 18:47:49,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-12 18:47:49,129 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2024-10-12 18:47:49,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:47:49,157 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2024-10-12 18:47:49,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 18:47:49,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 20 [2024-10-12 18:47:49,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:47:49,159 INFO L225 Difference]: With dead ends: 37 [2024-10-12 18:47:49,159 INFO L226 Difference]: Without dead ends: 25 [2024-10-12 18:47:49,159 INFO L431 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 [2024-10-12 18:47:49,160 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:47:49,160 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 68 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:47:49,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-12 18:47:49,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-10-12 18:47:49,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 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) [2024-10-12 18:47:49,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2024-10-12 18:47:49,170 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 20 [2024-10-12 18:47:49,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:47:49,171 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2024-10-12 18:47:49,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2024-10-12 18:47:49,172 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2024-10-12 18:47:49,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-12 18:47:49,173 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:47:49,173 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:47:49,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-12 18:47:49,173 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:47:49,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:47:49,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1051975660, now seen corresponding path program 1 times [2024-10-12 18:47:49,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:47:49,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483990822] [2024-10-12 18:47:49,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:47:49,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:47:49,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:47:49,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1178605128] [2024-10-12 18:47:49,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:47:49,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:47:49,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:47:49,218 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) [2024-10-12 18:47:49,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 18:47:49,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:47:49,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-12 18:47:49,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:47:49,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 18:47:49,379 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 18:47:49,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:47:49,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483990822] [2024-10-12 18:47:49,380 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:47:49,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178605128] [2024-10-12 18:47:49,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178605128] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:47:49,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:47:49,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 18:47:49,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820082845] [2024-10-12 18:47:49,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:47:49,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 18:47:49,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:47:49,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 18:47:49,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-12 18:47:49,385 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.6) 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) [2024-10-12 18:47:49,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:47:49,440 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2024-10-12 18:47:49,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 18:47:49,441 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 [2024-10-12 18:47:49,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:47:49,442 INFO L225 Difference]: With dead ends: 37 [2024-10-12 18:47:49,442 INFO L226 Difference]: Without dead ends: 34 [2024-10-12 18:47:49,443 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-12 18:47:49,444 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:47:49,445 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 75 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:47:49,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-10-12 18:47:49,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-10-12 18:47:49,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 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) [2024-10-12 18:47:49,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2024-10-12 18:47:49,454 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 21 [2024-10-12 18:47:49,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:47:49,454 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2024-10-12 18:47:49,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) [2024-10-12 18:47:49,454 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2024-10-12 18:47:49,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-12 18:47:49,456 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:47:49,456 INFO L215 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] [2024-10-12 18:47:49,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-12 18:47:49,660 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 [2024-10-12 18:47:49,661 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:47:49,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:47:49,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1831455308, now seen corresponding path program 1 times [2024-10-12 18:47:49,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:47:49,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274802413] [2024-10-12 18:47:49,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:47:49,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:47:49,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:47:49,916 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:47:49,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:47:49,921 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 18:47:49,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:47:49,923 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-12 18:47:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:47:49,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 18:47:49,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:47:49,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274802413] [2024-10-12 18:47:49,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274802413] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:47:49,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:47:49,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-12 18:47:49,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752080727] [2024-10-12 18:47:49,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:47:49,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 18:47:49,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:47:49,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 18:47:49,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 18:47:49,934 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2024-10-12 18:47:49,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:47:49,958 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2024-10-12 18:47:49,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 18:47:49,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 30 [2024-10-12 18:47:49,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:47:49,959 INFO L225 Difference]: With dead ends: 60 [2024-10-12 18:47:49,959 INFO L226 Difference]: Without dead ends: 35 [2024-10-12 18:47:49,960 INFO L431 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 [2024-10-12 18:47:49,960 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:47:49,961 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:47:49,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-12 18:47:49,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-10-12 18:47:49,968 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) [2024-10-12 18:47:49,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2024-10-12 18:47:49,969 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 30 [2024-10-12 18:47:49,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:47:49,969 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2024-10-12 18:47:49,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2024-10-12 18:47:49,970 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2024-10-12 18:47:49,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-12 18:47:49,971 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:47:49,971 INFO L215 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] [2024-10-12 18:47:49,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-12 18:47:49,971 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:47:49,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:47:49,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1020028593, now seen corresponding path program 1 times [2024-10-12 18:47:49,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:47:49,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579351520] [2024-10-12 18:47:49,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:47:49,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:47:49,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:47:50,055 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:47:50,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:47:50,064 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 18:47:50,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:47:50,069 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-12 18:47:50,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:47:50,073 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-12 18:47:50,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:47:50,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579351520] [2024-10-12 18:47:50,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579351520] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:47:50,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238634338] [2024-10-12 18:47:50,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:47:50,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:47:50,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:47:50,077 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) [2024-10-12 18:47:50,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 18:47:50,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:47:50,124 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-12 18:47:50,125 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:47:50,155 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-12 18:47:50,155 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:47:50,203 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-12 18:47:50,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238634338] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:47:50,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:47:50,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 10 [2024-10-12 18:47:50,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419576683] [2024-10-12 18:47:50,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:47:50,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-12 18:47:50,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:47:50,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-12 18:47:50,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-12 18:47:50,205 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-12 18:47:50,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:47:50,259 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2024-10-12 18:47:50,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-12 18:47:50,260 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 32 [2024-10-12 18:47:50,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:47:50,261 INFO L225 Difference]: With dead ends: 75 [2024-10-12 18:47:50,261 INFO L226 Difference]: Without dead ends: 54 [2024-10-12 18:47:50,262 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-10-12 18:47:50,264 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 18 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:47:50,264 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 127 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:47:50,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-12 18:47:50,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2024-10-12 18:47:50,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 35 states have internal predecessors, (43), 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) [2024-10-12 18:47:50,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2024-10-12 18:47:50,270 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 32 [2024-10-12 18:47:50,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:47:50,270 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2024-10-12 18:47:50,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-12 18:47:50,270 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2024-10-12 18:47:50,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-12 18:47:50,271 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:47:50,271 INFO L215 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] [2024-10-12 18:47:50,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-12 18:47:50,475 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 [2024-10-12 18:47:50,476 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:47:50,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:47:50,477 INFO L85 PathProgramCache]: Analyzing trace with hash -736358239, now seen corresponding path program 1 times [2024-10-12 18:47:50,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:47:50,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122492574] [2024-10-12 18:47:50,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:47:50,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:47:50,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:47:50,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1044623738] [2024-10-12 18:47:50,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:47:50,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:47:50,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:47:50,504 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) [2024-10-12 18:47:50,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 18:47:50,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:47:50,609 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-12 18:47:50,611 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:47:50,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 18:47:50,765 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:47:59,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:47:59,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122492574] [2024-10-12 18:47:59,143 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:47:59,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044623738] [2024-10-12 18:47:59,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044623738] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:47:59,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-12 18:47:59,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-10-12 18:47:59,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934955433] [2024-10-12 18:47:59,147 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-12 18:47:59,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-12 18:47:59,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:47:59,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-12 18:47:59,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=146, Unknown=2, NotChecked=0, Total=182 [2024-10-12 18:47:59,148 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 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) [2024-10-12 18:47:59,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:47:59,319 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2024-10-12 18:47:59,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-12 18:47:59,320 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 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 33 [2024-10-12 18:47:59,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:47:59,321 INFO L225 Difference]: With dead ends: 54 [2024-10-12 18:47:59,321 INFO L226 Difference]: Without dead ends: 51 [2024-10-12 18:47:59,321 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=40, Invalid=168, Unknown=2, NotChecked=0, Total=210 [2024-10-12 18:47:59,322 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:47:59,322 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 136 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 18:47:59,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-12 18:47:59,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-10-12 18:47:59,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.225) internal successors, (49), 41 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) [2024-10-12 18:47:59,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2024-10-12 18:47:59,333 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 33 [2024-10-12 18:47:59,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:47:59,333 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2024-10-12 18:47:59,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 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) [2024-10-12 18:47:59,334 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2024-10-12 18:47:59,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-12 18:47:59,335 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:47:59,335 INFO L215 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] [2024-10-12 18:47:59,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-12 18:47:59,538 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 [2024-10-12 18:47:59,539 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:47:59,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:47:59,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1620601913, now seen corresponding path program 2 times [2024-10-12 18:47:59,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:47:59,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713143375] [2024-10-12 18:47:59,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:47:59,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:47:59,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:47:59,905 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:47:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:47:59,907 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 18:47:59,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:47:59,909 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-12 18:47:59,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:47:59,915 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-12 18:47:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:47:59,918 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-12 18:47:59,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:47:59,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713143375] [2024-10-12 18:47:59,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713143375] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:47:59,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873275367] [2024-10-12 18:47:59,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 18:47:59,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:47:59,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:47:59,920 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) [2024-10-12 18:47:59,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 18:47:59,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 18:47:59,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:47:59,996 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-12 18:47:59,998 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:48:00,573 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 18:48:00,574 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:48:06,934 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-12 18:48:06,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873275367] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:48:06,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:48:06,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14, 15] total 30 [2024-10-12 18:48:06,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543485625] [2024-10-12 18:48:06,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:48:06,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-12 18:48:06,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:48:06,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-12 18:48:06,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2024-10-12 18:48:06,936 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 30 states, 29 states have (on average 2.310344827586207) internal successors, (67), 24 states have internal predecessors, (67), 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) [2024-10-12 18:48:08,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:48:08,244 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2024-10-12 18:48:08,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-12 18:48:08,245 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.310344827586207) internal successors, (67), 24 states have internal predecessors, (67), 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 42 [2024-10-12 18:48:08,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:48:08,246 INFO L225 Difference]: With dead ends: 107 [2024-10-12 18:48:08,246 INFO L226 Difference]: Without dead ends: 61 [2024-10-12 18:48:08,246 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2024-10-12 18:48:08,247 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 28 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:48:08,247 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 319 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-12 18:48:08,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-10-12 18:48:08,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2024-10-12 18:48:08,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.2) internal successors, (48), 41 states have internal predecessors, (48), 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) [2024-10-12 18:48:08,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2024-10-12 18:48:08,253 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 42 [2024-10-12 18:48:08,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:48:08,253 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2024-10-12 18:48:08,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.310344827586207) internal successors, (67), 24 states have internal predecessors, (67), 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) [2024-10-12 18:48:08,254 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2024-10-12 18:48:08,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-12 18:48:08,254 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:48:08,254 INFO L215 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] [2024-10-12 18:48:08,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-12 18:48:08,458 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 [2024-10-12 18:48:08,459 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:48:08,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:48:08,459 INFO L85 PathProgramCache]: Analyzing trace with hash -2080148684, now seen corresponding path program 3 times [2024-10-12 18:48:08,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:48:08,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318586836] [2024-10-12 18:48:08,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:48:08,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:48:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:48:08,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947113258] [2024-10-12 18:48:08,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 18:48:08,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:48:08,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:48:08,558 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) [2024-10-12 18:48:08,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-12 18:48:09,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-12 18:48:09,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:48:09,449 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-10-12 18:48:09,451 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:48:31,774 WARN L286 SmtUtils]: Spent 12.02s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-12 18:48:39,796 WARN L286 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-12 18:48:51,835 WARN L286 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-12 18:48:59,846 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-12 18:49:11,874 WARN L286 SmtUtils]: Spent 12.02s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-12 18:49:19,891 WARN L286 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-12 18:49:28,186 WARN L286 SmtUtils]: Spent 8.29s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)