./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/egcd3-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 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/egcd3-ll_unwindbound20.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7004d2b01bb7d5c4b1956f589017b61646e33c2f2be997467596b458e0de6322 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 02:19:16,237 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 02:19:16,303 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 02:19:16,306 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 02:19:16,306 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 02:19:16,327 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 02:19:16,327 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 02:19:16,327 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 02:19:16,328 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 02:19:16,328 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 02:19:16,328 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 02:19:16,328 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 02:19:16,329 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 02:19:16,329 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 02:19:16,329 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 02:19:16,329 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 02:19:16,329 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 02:19:16,330 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 02:19:16,330 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 02:19:16,330 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 02:19:16,332 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 02:19:16,333 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 02:19:16,335 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 02:19:16,335 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 02:19:16,336 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 02:19:16,336 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 02:19:16,336 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 02:19:16,336 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 02:19:16,336 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 02:19:16,336 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 02:19:16,336 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 02:19:16,336 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 02:19:16,337 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 02:19:16,337 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 02:19:16,337 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 02:19:16,337 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 02:19:16,337 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 02:19:16,337 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 02:19:16,337 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 02:19:16,337 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 02:19:16,337 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 02:19:16,338 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 02:19:16,338 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7004d2b01bb7d5c4b1956f589017b61646e33c2f2be997467596b458e0de6322 [2024-10-14 02:19:16,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 02:19:16,538 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 02:19:16,540 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 02:19:16,541 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 02:19:16,541 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 02:19:16,542 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound20.c [2024-10-14 02:19:17,739 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 02:19:17,855 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 02:19:17,855 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound20.c [2024-10-14 02:19:17,860 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3ac32b6b/756fee610686406198ea449ece6a7ffd/FLAG44dc0d83d [2024-10-14 02:19:17,870 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3ac32b6b/756fee610686406198ea449ece6a7ffd [2024-10-14 02:19:17,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 02:19:17,873 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 02:19:17,874 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 02:19:17,874 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 02:19:17,878 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 02:19:17,879 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:19:17" (1/1) ... [2024-10-14 02:19:17,879 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74bf06ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:19:17, skipping insertion in model container [2024-10-14 02:19:17,880 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:19:17" (1/1) ... [2024-10-14 02:19:17,897 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 02:19:18,025 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/egcd3-ll_unwindbound20.c[490,503] [2024-10-14 02:19:18,040 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 02:19:18,049 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 02:19:18,057 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/egcd3-ll_unwindbound20.c[490,503] [2024-10-14 02:19:18,064 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 02:19:18,076 INFO L204 MainTranslator]: Completed translation [2024-10-14 02:19:18,077 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:19:18 WrapperNode [2024-10-14 02:19:18,077 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 02:19:18,078 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 02:19:18,078 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 02:19:18,078 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 02:19:18,083 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:19:18" (1/1) ... [2024-10-14 02:19:18,090 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:19:18" (1/1) ... [2024-10-14 02:19:18,103 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 94 [2024-10-14 02:19:18,103 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 02:19:18,104 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 02:19:18,104 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 02:19:18,104 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 02:19:18,112 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:19:18" (1/1) ... [2024-10-14 02:19:18,112 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:19:18" (1/1) ... [2024-10-14 02:19:18,113 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:19:18" (1/1) ... [2024-10-14 02:19:18,121 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]. [2024-10-14 02:19:18,121 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:19:18" (1/1) ... [2024-10-14 02:19:18,121 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:19:18" (1/1) ... [2024-10-14 02:19:18,123 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:19:18" (1/1) ... [2024-10-14 02:19:18,126 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:19:18" (1/1) ... [2024-10-14 02:19:18,127 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:19:18" (1/1) ... [2024-10-14 02:19:18,127 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:19:18" (1/1) ... [2024-10-14 02:19:18,129 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 02:19:18,129 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 02:19:18,129 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 02:19:18,130 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 02:19:18,130 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:19:18" (1/1) ... [2024-10-14 02:19:18,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 02:19:18,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:19:18,158 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) [2024-10-14 02:19:18,170 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 [2024-10-14 02:19:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 02:19:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-14 02:19:18,207 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-14 02:19:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 02:19:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 02:19:18,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 02:19:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-14 02:19:18,215 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-14 02:19:18,262 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 02:19:18,264 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 02:19:18,370 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-10-14 02:19:18,370 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 02:19:18,396 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 02:19:18,396 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-14 02:19:18,397 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:19:18 BoogieIcfgContainer [2024-10-14 02:19:18,397 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 02:19:18,398 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 02:19:18,398 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 02:19:18,401 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 02:19:18,401 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 02:19:17" (1/3) ... [2024-10-14 02:19:18,401 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e888bd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:19:18, skipping insertion in model container [2024-10-14 02:19:18,401 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:19:18" (2/3) ... [2024-10-14 02:19:18,402 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e888bd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:19:18, skipping insertion in model container [2024-10-14 02:19:18,402 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:19:18" (3/3) ... [2024-10-14 02:19:18,403 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound20.c [2024-10-14 02:19:18,414 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 02:19:18,415 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 02:19:18,461 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 02:19:18,466 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;@35103d5f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 02:19:18,466 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-14 02:19:18,469 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-14 02:19:18,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-14 02:19:18,474 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:19:18,474 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:19:18,475 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:19:18,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:19:18,478 INFO L85 PathProgramCache]: Analyzing trace with hash -832436526, now seen corresponding path program 1 times [2024-10-14 02:19:18,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:19:18,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624891326] [2024-10-14 02:19:18,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:18,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:19:18,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:18,597 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 02:19:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:18,603 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-14 02:19:18,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:18,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 02:19:18,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:19:18,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624891326] [2024-10-14 02:19:18,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624891326] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:19:18,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:19:18,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 02:19:18,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561703890] [2024-10-14 02:19:18,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:19:18,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-14 02:19:18,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:19:18,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-14 02:19:18,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-14 02:19:18,635 INFO L87 Difference]: Start difference. First operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2024-10-14 02:19:18,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:19:18,662 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2024-10-14 02:19:18,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-14 02:19:18,664 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 17 [2024-10-14 02:19:18,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:19:18,669 INFO L225 Difference]: With dead ends: 62 [2024-10-14 02:19:18,669 INFO L226 Difference]: Without dead ends: 30 [2024-10-14 02:19:18,672 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 [2024-10-14 02:19:18,676 INFO L432 NwaCegarLoop]: 40 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, 40 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 [2024-10-14 02:19:18,677 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:19:18,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-10-14 02:19:18,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-10-14 02:19:18,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-14 02:19:18,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2024-10-14 02:19:18,712 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 17 [2024-10-14 02:19:18,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:19:18,712 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2024-10-14 02:19:18,713 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2024-10-14 02:19:18,713 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2024-10-14 02:19:18,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-14 02:19:18,714 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:19:18,715 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:19:18,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 02:19:18,715 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:19:18,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:19:18,716 INFO L85 PathProgramCache]: Analyzing trace with hash 958862887, now seen corresponding path program 1 times [2024-10-14 02:19:18,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:19:18,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623677927] [2024-10-14 02:19:18,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:18,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:19:18,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:18,892 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 02:19:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:18,910 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-14 02:19:18,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:18,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 02:19:18,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:19:18,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623677927] [2024-10-14 02:19:18,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623677927] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:19:18,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:19:18,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 02:19:18,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291478257] [2024-10-14 02:19:18,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:19:18,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 02:19:18,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:19:18,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 02:19:18,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 02:19:18,934 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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), 1 states have call successors, (2) [2024-10-14 02:19:18,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:19:18,958 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2024-10-14 02:19:18,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 02:19:18,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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), 1 states have call successors, (2) Word has length 18 [2024-10-14 02:19:18,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:19:18,961 INFO L225 Difference]: With dead ends: 39 [2024-10-14 02:19:18,961 INFO L226 Difference]: Without dead ends: 32 [2024-10-14 02:19:18,962 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 [2024-10-14 02:19:18,962 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:19:18,963 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 100 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:19:18,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-10-14 02:19:18,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-10-14 02:19:18,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-14 02:19:18,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2024-10-14 02:19:18,971 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2024-10-14 02:19:18,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:19:18,973 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2024-10-14 02:19:18,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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), 1 states have call successors, (2) [2024-10-14 02:19:18,973 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2024-10-14 02:19:18,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-14 02:19:18,973 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:19:18,974 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:19:18,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 02:19:18,974 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:19:18,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:19:18,974 INFO L85 PathProgramCache]: Analyzing trace with hash -359656705, now seen corresponding path program 1 times [2024-10-14 02:19:18,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:19:18,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855279852] [2024-10-14 02:19:18,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:18,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:19:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:19,079 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 02:19:19,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:19,084 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-14 02:19:19,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:19,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 02:19:19,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:19:19,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855279852] [2024-10-14 02:19:19,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855279852] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:19:19,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:19:19,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-14 02:19:19,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753491888] [2024-10-14 02:19:19,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:19:19,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 02:19:19,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:19:19,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 02:19:19,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-14 02:19:19,120 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 02:19:19,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:19:19,196 INFO L93 Difference]: Finished difference Result 52 states and 70 transitions. [2024-10-14 02:19:19,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 02:19:19,197 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2024-10-14 02:19:19,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:19:19,198 INFO L225 Difference]: With dead ends: 52 [2024-10-14 02:19:19,198 INFO L226 Difference]: Without dead ends: 45 [2024-10-14 02:19:19,198 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-14 02:19:19,199 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 45 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 02:19:19,199 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 130 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 02:19:19,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-10-14 02:19:19,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2024-10-14 02:19:19,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-14 02:19:19,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2024-10-14 02:19:19,211 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2024-10-14 02:19:19,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:19:19,211 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2024-10-14 02:19:19,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 02:19:19,211 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2024-10-14 02:19:19,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-14 02:19:19,212 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:19:19,212 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:19:19,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 02:19:19,212 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:19:19,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:19:19,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1735129581, now seen corresponding path program 1 times [2024-10-14 02:19:19,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:19:19,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380572762] [2024-10-14 02:19:19,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:19,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:19:19,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:19,303 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 02:19:19,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:19,310 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-14 02:19:19,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:19,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 02:19:19,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:19:19,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380572762] [2024-10-14 02:19:19,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380572762] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:19:19,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:19:19,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-14 02:19:19,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572996187] [2024-10-14 02:19:19,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:19:19,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 02:19:19,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:19:19,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 02:19:19,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 02:19:19,318 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2024-10-14 02:19:19,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:19:19,351 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2024-10-14 02:19:19,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 02:19:19,352 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 24 [2024-10-14 02:19:19,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:19:19,352 INFO L225 Difference]: With dead ends: 57 [2024-10-14 02:19:19,352 INFO L226 Difference]: Without dead ends: 35 [2024-10-14 02:19:19,353 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 02:19:19,353 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:19:19,354 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 126 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:19:19,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-14 02:19:19,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-10-14 02:19:19,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-14 02:19:19,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2024-10-14 02:19:19,358 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 24 [2024-10-14 02:19:19,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:19:19,358 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2024-10-14 02:19:19,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2024-10-14 02:19:19,359 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2024-10-14 02:19:19,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-14 02:19:19,359 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:19:19,359 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:19:19,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 02:19:19,360 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:19:19,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:19:19,360 INFO L85 PathProgramCache]: Analyzing trace with hash 150917056, now seen corresponding path program 1 times [2024-10-14 02:19:19,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:19:19,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461672626] [2024-10-14 02:19:19,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:19,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:19:19,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:19:19,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1502564473] [2024-10-14 02:19:19,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:19,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:19:19,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:19:19,377 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) [2024-10-14 02:19:19,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 02:19:19,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:19,424 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-14 02:19:19,428 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:19:19,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 02:19:19,545 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 02:19:19,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:19:19,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461672626] [2024-10-14 02:19:19,545 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:19:19,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502564473] [2024-10-14 02:19:19,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502564473] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:19:19,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:19:19,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 02:19:19,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479306755] [2024-10-14 02:19:19,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:19:19,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 02:19:19,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:19:19,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 02:19:19,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 02:19:19,547 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2024-10-14 02:19:19,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:19:19,593 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2024-10-14 02:19:19,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 02:19:19,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 24 [2024-10-14 02:19:19,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:19:19,595 INFO L225 Difference]: With dead ends: 53 [2024-10-14 02:19:19,595 INFO L226 Difference]: Without dead ends: 51 [2024-10-14 02:19:19,596 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 02:19:19,596 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 9 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:19:19,597 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 131 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:19:19,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-14 02:19:19,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2024-10-14 02:19:19,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 36 states have internal predecessors, (46), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-14 02:19:19,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2024-10-14 02:19:19,608 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 24 [2024-10-14 02:19:19,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:19:19,608 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2024-10-14 02:19:19,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2024-10-14 02:19:19,608 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2024-10-14 02:19:19,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-14 02:19:19,609 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:19:19,609 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:19:19,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-14 02:19:19,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:19:19,810 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:19:19,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:19:19,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1833090586, now seen corresponding path program 1 times [2024-10-14 02:19:19,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:19:19,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626439129] [2024-10-14 02:19:19,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:19,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:19:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:19,879 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 02:19:19,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:19,883 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-14 02:19:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 02:19:19,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:19:19,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626439129] [2024-10-14 02:19:19,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626439129] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 02:19:19,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042721351] [2024-10-14 02:19:19,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:19,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:19:19,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:19:19,888 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) [2024-10-14 02:19:19,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 02:19:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:19,935 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 02:19:19,937 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:19:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 02:19:19,988 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:19:20,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 02:19:20,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042721351] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:19:20,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 02:19:20,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 12 [2024-10-14 02:19:20,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688331192] [2024-10-14 02:19:20,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 02:19:20,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 02:19:20,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:19:20,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 02:19:20,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2024-10-14 02:19:20,052 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-14 02:19:20,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:19:20,188 INFO L93 Difference]: Finished difference Result 146 states and 192 transitions. [2024-10-14 02:19:20,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 02:19:20,189 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 25 [2024-10-14 02:19:20,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:19:20,191 INFO L225 Difference]: With dead ends: 146 [2024-10-14 02:19:20,191 INFO L226 Difference]: Without dead ends: 139 [2024-10-14 02:19:20,191 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2024-10-14 02:19:20,192 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 88 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 02:19:20,192 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 220 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 02:19:20,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-10-14 02:19:20,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 96. [2024-10-14 02:19:20,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 68 states have (on average 1.338235294117647) internal successors, (91), 70 states have internal predecessors, (91), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-10-14 02:19:20,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 129 transitions. [2024-10-14 02:19:20,209 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 129 transitions. Word has length 25 [2024-10-14 02:19:20,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:19:20,209 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 129 transitions. [2024-10-14 02:19:20,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-14 02:19:20,210 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 129 transitions. [2024-10-14 02:19:20,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-14 02:19:20,210 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:19:20,210 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:19:20,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-14 02:19:20,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-14 02:19:20,411 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:19:20,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:19:20,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1010868448, now seen corresponding path program 1 times [2024-10-14 02:19:20,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:19:20,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889379727] [2024-10-14 02:19:20,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:20,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:19:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:20,484 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 02:19:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:20,506 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-14 02:19:20,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:20,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 02:19:20,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:19:20,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889379727] [2024-10-14 02:19:20,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889379727] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 02:19:20,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549545218] [2024-10-14 02:19:20,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:20,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:19:20,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:19:20,513 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) [2024-10-14 02:19:20,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 02:19:20,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:20,554 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-14 02:19:20,554 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:19:20,587 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 02:19:20,587 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:19:20,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 02:19:20,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549545218] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:19:20,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 02:19:20,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-10-14 02:19:20,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529071378] [2024-10-14 02:19:20,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 02:19:20,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 02:19:20,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:19:20,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 02:19:20,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-14 02:19:20,650 INFO L87 Difference]: Start difference. First operand 96 states and 129 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 02:19:20,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:19:20,851 INFO L93 Difference]: Finished difference Result 182 states and 260 transitions. [2024-10-14 02:19:20,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 02:19:20,851 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2024-10-14 02:19:20,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:19:20,854 INFO L225 Difference]: With dead ends: 182 [2024-10-14 02:19:20,855 INFO L226 Difference]: Without dead ends: 170 [2024-10-14 02:19:20,856 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-10-14 02:19:20,856 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 112 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 02:19:20,857 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 275 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 02:19:20,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-10-14 02:19:20,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 127. [2024-10-14 02:19:20,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 96 states have (on average 1.3541666666666667) internal successors, (130), 97 states have internal predecessors, (130), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-10-14 02:19:20,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 175 transitions. [2024-10-14 02:19:20,885 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 175 transitions. Word has length 26 [2024-10-14 02:19:20,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:19:20,886 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 175 transitions. [2024-10-14 02:19:20,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 02:19:20,886 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 175 transitions. [2024-10-14 02:19:20,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-14 02:19:20,887 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:19:20,887 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:19:20,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-14 02:19:21,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:19:21,088 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:19:21,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:19:21,089 INFO L85 PathProgramCache]: Analyzing trace with hash 2130442992, now seen corresponding path program 1 times [2024-10-14 02:19:21,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:19:21,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064389048] [2024-10-14 02:19:21,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:21,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:19:21,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:19:21,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1577530955] [2024-10-14 02:19:21,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:21,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:19:21,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:19:21,102 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) [2024-10-14 02:19:21,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 02:19:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:21,147 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-14 02:19:21,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:19:21,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 02:19:21,209 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 02:19:21,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:19:21,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064389048] [2024-10-14 02:19:21,209 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:19:21,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577530955] [2024-10-14 02:19:21,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577530955] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:19:21,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:19:21,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 02:19:21,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646565520] [2024-10-14 02:19:21,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:19:21,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 02:19:21,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:19:21,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 02:19:21,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 02:19:21,210 INFO L87 Difference]: Start difference. First operand 127 states and 175 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 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) [2024-10-14 02:19:21,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:19:21,253 INFO L93 Difference]: Finished difference Result 142 states and 189 transitions. [2024-10-14 02:19:21,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 02:19:21,254 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 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 29 [2024-10-14 02:19:21,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:19:21,255 INFO L225 Difference]: With dead ends: 142 [2024-10-14 02:19:21,255 INFO L226 Difference]: Without dead ends: 140 [2024-10-14 02:19:21,255 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 02:19:21,256 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 9 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:19:21,256 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 129 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:19:21,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-10-14 02:19:21,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2024-10-14 02:19:21,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 105 states have (on average 1.3238095238095238) internal successors, (139), 106 states have internal predecessors, (139), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-10-14 02:19:21,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 184 transitions. [2024-10-14 02:19:21,271 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 184 transitions. Word has length 29 [2024-10-14 02:19:21,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:19:21,271 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 184 transitions. [2024-10-14 02:19:21,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 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) [2024-10-14 02:19:21,271 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 184 transitions. [2024-10-14 02:19:21,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-14 02:19:21,272 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:19:21,272 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] [2024-10-14 02:19:21,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-14 02:19:21,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:19:21,472 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:19:21,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:19:21,473 INFO L85 PathProgramCache]: Analyzing trace with hash 2110713919, now seen corresponding path program 1 times [2024-10-14 02:19:21,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:19:21,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101229817] [2024-10-14 02:19:21,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:21,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:19:21,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:19:21,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [237774620] [2024-10-14 02:19:21,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:21,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:19:21,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:19:21,489 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) [2024-10-14 02:19:21,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 02:19:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:21,531 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-14 02:19:21,532 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:19:21,641 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 02:19:21,641 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:19:21,760 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 02:19:21,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:19:21,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101229817] [2024-10-14 02:19:21,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:19:21,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237774620] [2024-10-14 02:19:21,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237774620] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:19:21,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 02:19:21,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2024-10-14 02:19:21,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355708979] [2024-10-14 02:19:21,761 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 02:19:21,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 02:19:21,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:19:21,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 02:19:21,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-14 02:19:21,761 INFO L87 Difference]: Start difference. First operand 139 states and 184 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 02:19:21,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:19:21,892 INFO L93 Difference]: Finished difference Result 174 states and 236 transitions. [2024-10-14 02:19:21,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 02:19:21,892 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2024-10-14 02:19:21,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:19:21,893 INFO L225 Difference]: With dead ends: 174 [2024-10-14 02:19:21,893 INFO L226 Difference]: Without dead ends: 172 [2024-10-14 02:19:21,893 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-10-14 02:19:21,894 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 19 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 02:19:21,894 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 294 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 02:19:21,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-10-14 02:19:21,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 169. [2024-10-14 02:19:21,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 126 states have (on average 1.3492063492063493) internal successors, (170), 127 states have internal predecessors, (170), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-10-14 02:19:21,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 231 transitions. [2024-10-14 02:19:21,913 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 231 transitions. Word has length 31 [2024-10-14 02:19:21,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:19:21,913 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 231 transitions. [2024-10-14 02:19:21,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 02:19:21,913 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 231 transitions. [2024-10-14 02:19:21,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-14 02:19:21,914 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:19:21,914 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:19:21,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-14 02:19:22,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:19:22,115 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:19:22,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:19:22,115 INFO L85 PathProgramCache]: Analyzing trace with hash -363027956, now seen corresponding path program 1 times [2024-10-14 02:19:22,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:19:22,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191022768] [2024-10-14 02:19:22,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:22,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:19:22,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:22,179 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 02:19:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:22,181 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-14 02:19:22,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:22,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 02:19:22,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:19:22,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191022768] [2024-10-14 02:19:22,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191022768] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:19:22,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:19:22,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-14 02:19:22,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205843701] [2024-10-14 02:19:22,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:19:22,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 02:19:22,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:19:22,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 02:19:22,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-10-14 02:19:22,188 INFO L87 Difference]: Start difference. First operand 169 states and 231 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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) [2024-10-14 02:19:22,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:19:22,223 INFO L93 Difference]: Finished difference Result 236 states and 324 transitions. [2024-10-14 02:19:22,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 02:19:22,223 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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 31 [2024-10-14 02:19:22,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:19:22,224 INFO L225 Difference]: With dead ends: 236 [2024-10-14 02:19:22,224 INFO L226 Difference]: Without dead ends: 169 [2024-10-14 02:19:22,225 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-10-14 02:19:22,225 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 10 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:19:22,225 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 151 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:19:22,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-10-14 02:19:22,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2024-10-14 02:19:22,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 126 states have (on average 1.3412698412698412) internal successors, (169), 127 states have internal predecessors, (169), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-10-14 02:19:22,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 230 transitions. [2024-10-14 02:19:22,240 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 230 transitions. Word has length 31 [2024-10-14 02:19:22,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:19:22,240 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 230 transitions. [2024-10-14 02:19:22,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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) [2024-10-14 02:19:22,240 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 230 transitions. [2024-10-14 02:19:22,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-14 02:19:22,242 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:19:22,242 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:19:22,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-14 02:19:22,242 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:19:22,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:19:22,242 INFO L85 PathProgramCache]: Analyzing trace with hash -242784896, now seen corresponding path program 1 times [2024-10-14 02:19:22,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:19:22,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660088662] [2024-10-14 02:19:22,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:22,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:19:22,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:19:22,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [382946180] [2024-10-14 02:19:22,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:22,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:19:22,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:19:22,253 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:19:22,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-14 02:19:22,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:22,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 02:19:22,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:19:22,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-14 02:19:22,328 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 02:19:22,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:19:22,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660088662] [2024-10-14 02:19:22,328 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:19:22,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382946180] [2024-10-14 02:19:22,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382946180] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:19:22,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:19:22,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 02:19:22,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551564460] [2024-10-14 02:19:22,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:19:22,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 02:19:22,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:19:22,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 02:19:22,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 02:19:22,329 INFO L87 Difference]: Start difference. First operand 169 states and 230 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-14 02:19:22,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:19:22,383 INFO L93 Difference]: Finished difference Result 234 states and 330 transitions. [2024-10-14 02:19:22,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 02:19:22,383 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2024-10-14 02:19:22,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:19:22,385 INFO L225 Difference]: With dead ends: 234 [2024-10-14 02:19:22,385 INFO L226 Difference]: Without dead ends: 232 [2024-10-14 02:19:22,386 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 02:19:22,386 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:19:22,386 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 121 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:19:22,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-10-14 02:19:22,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 225. [2024-10-14 02:19:22,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 159 states have (on average 1.371069182389937) internal successors, (218), 160 states have internal predecessors, (218), 51 states have call successors, (51), 14 states have call predecessors, (51), 14 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2024-10-14 02:19:22,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 319 transitions. [2024-10-14 02:19:22,416 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 319 transitions. Word has length 34 [2024-10-14 02:19:22,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:19:22,417 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 319 transitions. [2024-10-14 02:19:22,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-14 02:19:22,417 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 319 transitions. [2024-10-14 02:19:22,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-14 02:19:22,419 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:19:22,419 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, 1, 1, 1] [2024-10-14 02:19:22,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-14 02:19:22,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:19:22,620 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:19:22,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:19:22,620 INFO L85 PathProgramCache]: Analyzing trace with hash -568879, now seen corresponding path program 1 times [2024-10-14 02:19:22,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:19:22,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560700534] [2024-10-14 02:19:22,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:22,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:19:22,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:19:22,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259913192] [2024-10-14 02:19:22,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:22,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:19:22,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:19:22,631 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:19:22,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-14 02:19:22,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:22,673 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-14 02:19:22,674 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:19:22,845 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 02:19:22,845 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:19:22,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:19:22,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560700534] [2024-10-14 02:19:22,884 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:19:22,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259913192] [2024-10-14 02:19:22,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259913192] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 02:19:22,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-14 02:19:22,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-10-14 02:19:22,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903145725] [2024-10-14 02:19:22,884 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-14 02:19:22,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 02:19:22,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:19:22,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 02:19:22,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-10-14 02:19:22,885 INFO L87 Difference]: Start difference. First operand 225 states and 319 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 02:19:23,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:19:23,044 INFO L93 Difference]: Finished difference Result 237 states and 329 transitions. [2024-10-14 02:19:23,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 02:19:23,045 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2024-10-14 02:19:23,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:19:23,046 INFO L225 Difference]: With dead ends: 237 [2024-10-14 02:19:23,046 INFO L226 Difference]: Without dead ends: 235 [2024-10-14 02:19:23,046 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2024-10-14 02:19:23,047 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 68 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 02:19:23,047 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 253 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 02:19:23,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-10-14 02:19:23,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 233. [2024-10-14 02:19:23,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 165 states have (on average 1.3575757575757577) internal successors, (224), 166 states have internal predecessors, (224), 51 states have call successors, (51), 16 states have call predecessors, (51), 16 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2024-10-14 02:19:23,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 325 transitions. [2024-10-14 02:19:23,061 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 325 transitions. Word has length 36 [2024-10-14 02:19:23,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:19:23,061 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 325 transitions. [2024-10-14 02:19:23,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 02:19:23,062 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 325 transitions. [2024-10-14 02:19:23,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-14 02:19:23,062 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:19:23,062 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:19:23,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-14 02:19:23,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:19:23,263 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:19:23,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:19:23,263 INFO L85 PathProgramCache]: Analyzing trace with hash 895823024, now seen corresponding path program 1 times [2024-10-14 02:19:23,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:19:23,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890250052] [2024-10-14 02:19:23,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:23,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:19:23,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:19:23,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1568469489] [2024-10-14 02:19:23,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:23,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:19:23,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:19:23,272 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:19:23,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-14 02:19:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:23,311 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 02:19:23,312 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:19:23,349 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-14 02:19:23,349 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 02:19:23,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:19:23,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890250052] [2024-10-14 02:19:23,349 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:19:23,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568469489] [2024-10-14 02:19:23,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568469489] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:19:23,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:19:23,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 02:19:23,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371148404] [2024-10-14 02:19:23,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:19:23,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 02:19:23,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:19:23,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 02:19:23,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 02:19:23,351 INFO L87 Difference]: Start difference. First operand 233 states and 325 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-14 02:19:23,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:19:23,411 INFO L93 Difference]: Finished difference Result 308 states and 453 transitions. [2024-10-14 02:19:23,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 02:19:23,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2024-10-14 02:19:23,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:19:23,413 INFO L225 Difference]: With dead ends: 308 [2024-10-14 02:19:23,413 INFO L226 Difference]: Without dead ends: 306 [2024-10-14 02:19:23,413 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 02:19:23,414 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 5 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:19:23,414 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 129 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:19:23,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2024-10-14 02:19:23,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 291. [2024-10-14 02:19:23,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 186 states have (on average 1.3602150537634408) internal successors, (253), 196 states have internal predecessors, (253), 87 states have call successors, (87), 17 states have call predecessors, (87), 17 states have return successors, (86), 77 states have call predecessors, (86), 86 states have call successors, (86) [2024-10-14 02:19:23,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 426 transitions. [2024-10-14 02:19:23,436 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 426 transitions. Word has length 39 [2024-10-14 02:19:23,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:19:23,436 INFO L471 AbstractCegarLoop]: Abstraction has 291 states and 426 transitions. [2024-10-14 02:19:23,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-14 02:19:23,437 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 426 transitions. [2024-10-14 02:19:23,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-14 02:19:23,437 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:19:23,437 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:19:23,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-14 02:19:23,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-14 02:19:23,638 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:19:23,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:19:23,638 INFO L85 PathProgramCache]: Analyzing trace with hash 184539710, now seen corresponding path program 1 times [2024-10-14 02:19:23,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:19:23,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822242175] [2024-10-14 02:19:23,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:23,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:19:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:23,705 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 02:19:23,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:23,707 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-14 02:19:23,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:23,710 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 02:19:23,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:19:23,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822242175] [2024-10-14 02:19:23,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822242175] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 02:19:23,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238395379] [2024-10-14 02:19:23,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:23,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:19:23,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:19:23,712 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:19:23,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-14 02:19:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:23,754 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-14 02:19:23,755 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:19:23,782 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 02:19:23,782 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:19:23,840 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 02:19:23,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238395379] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:19:23,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 02:19:23,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 14 [2024-10-14 02:19:23,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86697486] [2024-10-14 02:19:23,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 02:19:23,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 02:19:23,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:19:23,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 02:19:23,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2024-10-14 02:19:23,842 INFO L87 Difference]: Start difference. First operand 291 states and 426 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-14 02:19:24,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:19:24,033 INFO L93 Difference]: Finished difference Result 724 states and 1030 transitions. [2024-10-14 02:19:24,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-14 02:19:24,034 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 37 [2024-10-14 02:19:24,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:19:24,039 INFO L225 Difference]: With dead ends: 724 [2024-10-14 02:19:24,039 INFO L226 Difference]: Without dead ends: 574 [2024-10-14 02:19:24,040 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2024-10-14 02:19:24,040 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 141 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 02:19:24,041 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 230 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 02:19:24,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2024-10-14 02:19:24,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 540. [2024-10-14 02:19:24,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 356 states have (on average 1.300561797752809) internal successors, (463), 370 states have internal predecessors, (463), 142 states have call successors, (142), 41 states have call predecessors, (142), 41 states have return successors, (138), 128 states have call predecessors, (138), 138 states have call successors, (138) [2024-10-14 02:19:24,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 743 transitions. [2024-10-14 02:19:24,086 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 743 transitions. Word has length 37 [2024-10-14 02:19:24,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:19:24,086 INFO L471 AbstractCegarLoop]: Abstraction has 540 states and 743 transitions. [2024-10-14 02:19:24,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-14 02:19:24,086 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 743 transitions. [2024-10-14 02:19:24,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-14 02:19:24,087 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:19:24,087 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:19:24,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-14 02:19:24,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-14 02:19:24,287 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:19:24,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:19:24,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1387261216, now seen corresponding path program 2 times [2024-10-14 02:19:24,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:19:24,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155405564] [2024-10-14 02:19:24,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:24,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:19:24,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:24,329 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 02:19:24,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:24,330 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-14 02:19:24,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:24,331 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 02:19:24,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:19:24,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155405564] [2024-10-14 02:19:24,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155405564] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:19:24,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:19:24,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 02:19:24,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228384749] [2024-10-14 02:19:24,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:19:24,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 02:19:24,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:19:24,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 02:19:24,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 02:19:24,333 INFO L87 Difference]: Start difference. First operand 540 states and 743 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2024-10-14 02:19:24,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:19:24,427 INFO L93 Difference]: Finished difference Result 788 states and 1135 transitions. [2024-10-14 02:19:24,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 02:19:24,427 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 38 [2024-10-14 02:19:24,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:19:24,430 INFO L225 Difference]: With dead ends: 788 [2024-10-14 02:19:24,430 INFO L226 Difference]: Without dead ends: 643 [2024-10-14 02:19:24,434 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-14 02:19:24,434 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 29 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:19:24,435 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 169 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:19:24,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2024-10-14 02:19:24,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 538. [2024-10-14 02:19:24,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 358 states have (on average 1.3072625698324023) internal successors, (468), 372 states have internal predecessors, (468), 138 states have call successors, (138), 41 states have call predecessors, (138), 41 states have return successors, (134), 124 states have call predecessors, (134), 134 states have call successors, (134) [2024-10-14 02:19:24,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 740 transitions. [2024-10-14 02:19:24,506 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 740 transitions. Word has length 38 [2024-10-14 02:19:24,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:19:24,506 INFO L471 AbstractCegarLoop]: Abstraction has 538 states and 740 transitions. [2024-10-14 02:19:24,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2024-10-14 02:19:24,507 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 740 transitions. [2024-10-14 02:19:24,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-14 02:19:24,507 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:19:24,507 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:19:24,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-14 02:19:24,507 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:19:24,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:19:24,508 INFO L85 PathProgramCache]: Analyzing trace with hash 869918208, now seen corresponding path program 1 times [2024-10-14 02:19:24,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:19:24,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614951377] [2024-10-14 02:19:24,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:24,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:19:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:24,605 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 02:19:24,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:24,607 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-14 02:19:24,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:24,610 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 02:19:24,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:19:24,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614951377] [2024-10-14 02:19:24,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614951377] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 02:19:24,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918337877] [2024-10-14 02:19:24,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:24,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:19:24,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:19:24,611 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:19:24,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-14 02:19:24,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:24,650 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-14 02:19:24,651 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:19:24,686 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 02:19:24,686 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:19:24,756 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 02:19:24,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918337877] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:19:24,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 02:19:24,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 16 [2024-10-14 02:19:24,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366600159] [2024-10-14 02:19:24,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 02:19:24,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-14 02:19:24,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:19:24,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-14 02:19:24,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2024-10-14 02:19:24,758 INFO L87 Difference]: Start difference. First operand 538 states and 740 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-14 02:19:25,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:19:25,022 INFO L93 Difference]: Finished difference Result 1162 states and 1624 transitions. [2024-10-14 02:19:25,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-14 02:19:25,023 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2024-10-14 02:19:25,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:19:25,026 INFO L225 Difference]: With dead ends: 1162 [2024-10-14 02:19:25,026 INFO L226 Difference]: Without dead ends: 839 [2024-10-14 02:19:25,027 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2024-10-14 02:19:25,027 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 186 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 02:19:25,027 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 293 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 02:19:25,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2024-10-14 02:19:25,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 802. [2024-10-14 02:19:25,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 532 states have (on average 1.25) internal successors, (665), 554 states have internal predecessors, (665), 212 states have call successors, (212), 57 states have call predecessors, (212), 57 states have return successors, (206), 190 states have call predecessors, (206), 206 states have call successors, (206) [2024-10-14 02:19:25,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 1083 transitions. [2024-10-14 02:19:25,085 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 1083 transitions. Word has length 38 [2024-10-14 02:19:25,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:19:25,085 INFO L471 AbstractCegarLoop]: Abstraction has 802 states and 1083 transitions. [2024-10-14 02:19:25,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-14 02:19:25,085 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 1083 transitions. [2024-10-14 02:19:25,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-10-14 02:19:25,086 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:19:25,086 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:19:25,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-14 02:19:25,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-14 02:19:25,287 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:19:25,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:19:25,287 INFO L85 PathProgramCache]: Analyzing trace with hash -263121925, now seen corresponding path program 1 times [2024-10-14 02:19:25,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:19:25,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594466213] [2024-10-14 02:19:25,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:25,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:19:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:19:25,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2028541914] [2024-10-14 02:19:25,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:25,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:19:25,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:19:25,303 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:19:25,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-14 02:19:25,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:25,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-14 02:19:25,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:19:25,891 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-14 02:19:25,891 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:19:27,307 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-14 02:19:27,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:19:27,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594466213] [2024-10-14 02:19:27,308 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:19:27,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028541914] [2024-10-14 02:19:27,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028541914] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:19:27,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 02:19:27,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-10-14 02:19:27,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642939450] [2024-10-14 02:19:27,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 02:19:27,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-14 02:19:27,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:19:27,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-14 02:19:27,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-10-14 02:19:27,310 INFO L87 Difference]: Start difference. First operand 802 states and 1083 transitions. Second operand has 23 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-10-14 02:19:31,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:19:31,380 INFO L93 Difference]: Finished difference Result 1217 states and 1722 transitions. [2024-10-14 02:19:31,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-10-14 02:19:31,380 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 53 [2024-10-14 02:19:31,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:19:31,385 INFO L225 Difference]: With dead ends: 1217 [2024-10-14 02:19:31,385 INFO L226 Difference]: Without dead ends: 1195 [2024-10-14 02:19:31,386 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2024-10-14 02:19:31,387 INFO L432 NwaCegarLoop]: 83 mSDtfsCounter, 323 mSDsluCounter, 1099 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-10-14 02:19:31,387 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 1182 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-10-14 02:19:31,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2024-10-14 02:19:31,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 884. [2024-10-14 02:19:31,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 591 states have (on average 1.2538071065989849) internal successors, (741), 611 states have internal predecessors, (741), 231 states have call successors, (231), 61 states have call predecessors, (231), 61 states have return successors, (226), 211 states have call predecessors, (226), 226 states have call successors, (226) [2024-10-14 02:19:31,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1198 transitions. [2024-10-14 02:19:31,534 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1198 transitions. Word has length 53 [2024-10-14 02:19:31,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:19:31,534 INFO L471 AbstractCegarLoop]: Abstraction has 884 states and 1198 transitions. [2024-10-14 02:19:31,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-10-14 02:19:31,534 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1198 transitions. [2024-10-14 02:19:31,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-10-14 02:19:31,534 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:19:31,534 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:19:31,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-14 02:19:31,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-14 02:19:31,735 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:19:31,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:19:31,736 INFO L85 PathProgramCache]: Analyzing trace with hash -2029616726, now seen corresponding path program 1 times [2024-10-14 02:19:31,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:19:31,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837935066] [2024-10-14 02:19:31,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:31,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:19:31,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:31,845 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 02:19:31,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:31,848 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-14 02:19:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:31,849 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-14 02:19:31,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:31,851 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-14 02:19:31,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:31,854 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-14 02:19:31,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:31,855 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-14 02:19:31,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-14 02:19:31,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:19:31,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837935066] [2024-10-14 02:19:31,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837935066] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 02:19:31,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823355222] [2024-10-14 02:19:31,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:31,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:19:31,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:19:31,859 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:19:31,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-14 02:19:31,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:31,900 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-14 02:19:31,901 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:19:31,954 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-14 02:19:31,955 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:19:32,052 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-14 02:19:32,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823355222] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:19:32,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 02:19:32,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 20 [2024-10-14 02:19:32,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856595924] [2024-10-14 02:19:32,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 02:19:32,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-14 02:19:32,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:19:32,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-14 02:19:32,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2024-10-14 02:19:32,054 INFO L87 Difference]: Start difference. First operand 884 states and 1198 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 6 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2024-10-14 02:19:32,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:19:32,587 INFO L93 Difference]: Finished difference Result 1905 states and 2712 transitions. [2024-10-14 02:19:32,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-14 02:19:32,588 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 6 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 59 [2024-10-14 02:19:32,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:19:32,595 INFO L225 Difference]: With dead ends: 1905 [2024-10-14 02:19:32,595 INFO L226 Difference]: Without dead ends: 1883 [2024-10-14 02:19:32,596 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=303, Invalid=567, Unknown=0, NotChecked=0, Total=870 [2024-10-14 02:19:32,597 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 355 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 02:19:32,597 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 330 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 02:19:32,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2024-10-14 02:19:32,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1789. [2024-10-14 02:19:32,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1789 states, 1180 states have (on average 1.2923728813559323) internal successors, (1525), 1240 states have internal predecessors, (1525), 511 states have call successors, (511), 97 states have call predecessors, (511), 97 states have return successors, (502), 451 states have call predecessors, (502), 502 states have call successors, (502) [2024-10-14 02:19:32,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1789 states to 1789 states and 2538 transitions. [2024-10-14 02:19:32,921 INFO L78 Accepts]: Start accepts. Automaton has 1789 states and 2538 transitions. Word has length 59 [2024-10-14 02:19:32,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:19:32,922 INFO L471 AbstractCegarLoop]: Abstraction has 1789 states and 2538 transitions. [2024-10-14 02:19:32,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 6 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2024-10-14 02:19:32,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1789 states and 2538 transitions. [2024-10-14 02:19:32,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-10-14 02:19:32,922 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:19:32,923 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 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] [2024-10-14 02:19:32,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-14 02:19:33,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-14 02:19:33,127 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:19:33,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:19:33,127 INFO L85 PathProgramCache]: Analyzing trace with hash -240119973, now seen corresponding path program 1 times [2024-10-14 02:19:33,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:19:33,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322209939] [2024-10-14 02:19:33,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:33,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:19:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:33,158 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 02:19:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:33,160 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-14 02:19:33,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:33,161 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 02:19:33,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:33,162 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-14 02:19:33,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:33,164 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-10-14 02:19:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:33,166 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-10-14 02:19:33,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:33,167 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-10-14 02:19:33,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:33,168 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-10-14 02:19:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:33,170 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-10-14 02:19:33,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:19:33,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322209939] [2024-10-14 02:19:33,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322209939] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:19:33,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:19:33,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 02:19:33,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142221378] [2024-10-14 02:19:33,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:19:33,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 02:19:33,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:19:33,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 02:19:33,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 02:19:33,171 INFO L87 Difference]: Start difference. First operand 1789 states and 2538 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-10-14 02:19:33,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:19:33,468 INFO L93 Difference]: Finished difference Result 3148 states and 4463 transitions. [2024-10-14 02:19:33,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 02:19:33,469 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 61 [2024-10-14 02:19:33,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:19:33,477 INFO L225 Difference]: With dead ends: 3148 [2024-10-14 02:19:33,478 INFO L226 Difference]: Without dead ends: 1883 [2024-10-14 02:19:33,480 INFO L431 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 [2024-10-14 02:19:33,480 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:19:33,481 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 126 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:19:33,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2024-10-14 02:19:33,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1810. [2024-10-14 02:19:33,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1241 states have (on average 1.2957292506043514) internal successors, (1608), 1270 states have internal predecessors, (1608), 471 states have call successors, (471), 97 states have call predecessors, (471), 97 states have return successors, (462), 442 states have call predecessors, (462), 462 states have call successors, (462) [2024-10-14 02:19:33,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 2541 transitions. [2024-10-14 02:19:33,767 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 2541 transitions. Word has length 61 [2024-10-14 02:19:33,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:19:33,768 INFO L471 AbstractCegarLoop]: Abstraction has 1810 states and 2541 transitions. [2024-10-14 02:19:33,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-10-14 02:19:33,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 2541 transitions. [2024-10-14 02:19:33,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-10-14 02:19:33,769 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:19:33,769 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 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] [2024-10-14 02:19:33,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-10-14 02:19:33,769 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:19:33,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:19:33,770 INFO L85 PathProgramCache]: Analyzing trace with hash -421215721, now seen corresponding path program 1 times [2024-10-14 02:19:33,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:19:33,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346998806] [2024-10-14 02:19:33,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:33,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:19:33,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:19:33,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1656460676] [2024-10-14 02:19:33,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:33,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:19:33,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:19:33,782 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:19:33,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-14 02:19:33,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:33,828 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-14 02:19:33,829 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:19:33,876 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2024-10-14 02:19:33,876 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:19:33,922 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-10-14 02:19:33,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:19:33,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346998806] [2024-10-14 02:19:33,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:19:33,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656460676] [2024-10-14 02:19:33,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656460676] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-14 02:19:33,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 02:19:33,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-10-14 02:19:33,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138355696] [2024-10-14 02:19:33,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:19:33,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 02:19:33,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:19:33,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 02:19:33,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-14 02:19:33,924 INFO L87 Difference]: Start difference. First operand 1810 states and 2541 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-14 02:19:34,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:19:34,249 INFO L93 Difference]: Finished difference Result 1848 states and 2578 transitions. [2024-10-14 02:19:34,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 02:19:34,249 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 62 [2024-10-14 02:19:34,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:19:34,256 INFO L225 Difference]: With dead ends: 1848 [2024-10-14 02:19:34,257 INFO L226 Difference]: Without dead ends: 1846 [2024-10-14 02:19:34,257 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-14 02:19:34,258 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 5 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:19:34,258 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 122 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:19:34,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2024-10-14 02:19:34,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1846. [2024-10-14 02:19:34,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1846 states, 1268 states have (on average 1.2878548895899053) internal successors, (1633), 1297 states have internal predecessors, (1633), 471 states have call successors, (471), 106 states have call predecessors, (471), 106 states have return successors, (462), 442 states have call predecessors, (462), 462 states have call successors, (462) [2024-10-14 02:19:34,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 2566 transitions. [2024-10-14 02:19:34,536 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 2566 transitions. Word has length 62 [2024-10-14 02:19:34,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:19:34,536 INFO L471 AbstractCegarLoop]: Abstraction has 1846 states and 2566 transitions. [2024-10-14 02:19:34,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-14 02:19:34,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 2566 transitions. [2024-10-14 02:19:34,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-14 02:19:34,537 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:19:34,537 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 2, 2, 2, 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, 1] [2024-10-14 02:19:34,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-14 02:19:34,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-10-14 02:19:34,744 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:19:34,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:19:34,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1734545172, now seen corresponding path program 1 times [2024-10-14 02:19:34,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:19:34,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220878239] [2024-10-14 02:19:34,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:34,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:19:34,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:19:34,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [777593237] [2024-10-14 02:19:34,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:34,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:19:34,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:19:34,758 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:19:34,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-14 02:19:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:34,805 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-10-14 02:19:34,806 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:19:35,257 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-10-14 02:19:35,257 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:19:36,499 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-14 02:19:36,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:19:36,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220878239] [2024-10-14 02:19:36,499 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:19:36,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777593237] [2024-10-14 02:19:36,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777593237] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:19:36,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 02:19:36,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-10-14 02:19:36,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732843460] [2024-10-14 02:19:36,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 02:19:36,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-14 02:19:36,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:19:36,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-14 02:19:36,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-10-14 02:19:36,501 INFO L87 Difference]: Start difference. First operand 1846 states and 2566 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 20 states have internal predecessors, (61), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2024-10-14 02:19:40,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.14s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 02:19:43,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 02:19:46,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:19:46,675 INFO L93 Difference]: Finished difference Result 2448 states and 3457 transitions. [2024-10-14 02:19:46,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-14 02:19:46,676 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 20 states have internal predecessors, (61), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 63 [2024-10-14 02:19:46,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:19:46,688 INFO L225 Difference]: With dead ends: 2448 [2024-10-14 02:19:46,688 INFO L226 Difference]: Without dead ends: 2446 [2024-10-14 02:19:46,689 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=417, Invalid=1653, Unknown=0, NotChecked=0, Total=2070 [2024-10-14 02:19:46,690 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 262 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:19:46,690 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 609 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2024-10-14 02:19:46,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2024-10-14 02:19:47,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2316. [2024-10-14 02:19:47,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2316 states, 1610 states have (on average 1.3093167701863353) internal successors, (2108), 1647 states have internal predecessors, (2108), 591 states have call successors, (591), 114 states have call predecessors, (591), 114 states have return successors, (582), 554 states have call predecessors, (582), 582 states have call successors, (582) [2024-10-14 02:19:47,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 3281 transitions. [2024-10-14 02:19:47,164 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 3281 transitions. Word has length 63 [2024-10-14 02:19:47,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:19:47,164 INFO L471 AbstractCegarLoop]: Abstraction has 2316 states and 3281 transitions. [2024-10-14 02:19:47,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 20 states have internal predecessors, (61), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2024-10-14 02:19:47,164 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 3281 transitions. [2024-10-14 02:19:47,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-10-14 02:19:47,165 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:19:47,165 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 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, 1] [2024-10-14 02:19:47,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-14 02:19:47,368 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:19:47,369 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:19:47,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:19:47,369 INFO L85 PathProgramCache]: Analyzing trace with hash -2144187133, now seen corresponding path program 2 times [2024-10-14 02:19:47,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:19:47,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397337164] [2024-10-14 02:19:47,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:47,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:19:47,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:19:47,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1070247540] [2024-10-14 02:19:47,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 02:19:47,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:19:47,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:19:47,380 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:19:47,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-14 02:19:47,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 02:19:47,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 02:19:47,424 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-14 02:19:47,425 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:19:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-14 02:19:47,573 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:19:47,643 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-14 02:19:47,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:19:47,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397337164] [2024-10-14 02:19:47,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:19:47,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070247540] [2024-10-14 02:19:47,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070247540] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:19:47,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 02:19:47,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2024-10-14 02:19:47,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060406112] [2024-10-14 02:19:47,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 02:19:47,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-14 02:19:47,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:19:47,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-14 02:19:47,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-10-14 02:19:47,644 INFO L87 Difference]: Start difference. First operand 2316 states and 3281 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-10-14 02:19:48,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:19:48,416 INFO L93 Difference]: Finished difference Result 2758 states and 3906 transitions. [2024-10-14 02:19:48,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 02:19:48,417 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 65 [2024-10-14 02:19:48,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:19:48,427 INFO L225 Difference]: With dead ends: 2758 [2024-10-14 02:19:48,427 INFO L226 Difference]: Without dead ends: 2756 [2024-10-14 02:19:48,428 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2024-10-14 02:19:48,428 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 83 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 02:19:48,428 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 398 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 02:19:48,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2756 states. [2024-10-14 02:19:48,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2756 to 2563. [2024-10-14 02:19:48,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 1824 states have (on average 1.3135964912280702) internal successors, (2396), 1873 states have internal predecessors, (2396), 611 states have call successors, (611), 127 states have call predecessors, (611), 127 states have return successors, (602), 562 states have call predecessors, (602), 602 states have call successors, (602) [2024-10-14 02:19:48,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 3609 transitions. [2024-10-14 02:19:48,975 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 3609 transitions. Word has length 65 [2024-10-14 02:19:48,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:19:48,975 INFO L471 AbstractCegarLoop]: Abstraction has 2563 states and 3609 transitions. [2024-10-14 02:19:48,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-10-14 02:19:48,976 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 3609 transitions. [2024-10-14 02:19:48,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-10-14 02:19:48,976 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:19:48,976 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2024-10-14 02:19:48,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-14 02:19:49,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:19:49,177 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:19:49,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:19:49,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1940891938, now seen corresponding path program 1 times [2024-10-14 02:19:49,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:19:49,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004838393] [2024-10-14 02:19:49,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:49,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:19:49,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:19:49,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [810445116] [2024-10-14 02:19:49,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:49,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:19:49,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:19:49,190 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:19:49,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-14 02:19:49,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:49,239 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-10-14 02:19:49,241 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:19:49,820 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-10-14 02:19:49,820 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:19:51,321 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-10-14 02:19:51,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:19:51,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004838393] [2024-10-14 02:19:51,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:19:51,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810445116] [2024-10-14 02:19:51,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810445116] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:19:51,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 02:19:51,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2024-10-14 02:19:51,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685407897] [2024-10-14 02:19:51,321 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 02:19:51,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-14 02:19:51,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:19:51,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-14 02:19:51,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2024-10-14 02:19:51,322 INFO L87 Difference]: Start difference. First operand 2563 states and 3609 transitions. Second operand has 25 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-10-14 02:19:56,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:19:56,650 INFO L93 Difference]: Finished difference Result 2868 states and 4008 transitions. [2024-10-14 02:19:56,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-10-14 02:19:56,651 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 76 [2024-10-14 02:19:56,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:19:56,661 INFO L225 Difference]: With dead ends: 2868 [2024-10-14 02:19:56,662 INFO L226 Difference]: Without dead ends: 2861 [2024-10-14 02:19:56,663 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=737, Invalid=3045, Unknown=0, NotChecked=0, Total=3782 [2024-10-14 02:19:56,663 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 293 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-10-14 02:19:56,663 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 990 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-10-14 02:19:56,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2024-10-14 02:19:57,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2779. [2024-10-14 02:19:57,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2779 states, 1954 states have (on average 1.3070624360286591) internal successors, (2554), 2004 states have internal predecessors, (2554), 676 states have call successors, (676), 148 states have call predecessors, (676), 148 states have return successors, (670), 626 states have call predecessors, (670), 670 states have call successors, (670) [2024-10-14 02:19:57,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2779 states to 2779 states and 3900 transitions. [2024-10-14 02:19:57,434 INFO L78 Accepts]: Start accepts. Automaton has 2779 states and 3900 transitions. Word has length 76 [2024-10-14 02:19:57,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:19:57,435 INFO L471 AbstractCegarLoop]: Abstraction has 2779 states and 3900 transitions. [2024-10-14 02:19:57,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-10-14 02:19:57,435 INFO L276 IsEmpty]: Start isEmpty. Operand 2779 states and 3900 transitions. [2024-10-14 02:19:57,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-10-14 02:19:57,436 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:19:57,436 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 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, 1, 1] [2024-10-14 02:19:57,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-14 02:19:57,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-10-14 02:19:57,640 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:19:57,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:19:57,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1286517375, now seen corresponding path program 1 times [2024-10-14 02:19:57,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:19:57,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428332409] [2024-10-14 02:19:57,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:57,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:19:57,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:19:57,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [625468310] [2024-10-14 02:19:57,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:19:57,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:19:57,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:19:57,652 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:19:57,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-14 02:19:57,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:19:57,706 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-14 02:19:57,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:19:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-10-14 02:19:57,905 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:19:58,319 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 29 proven. 17 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-10-14 02:19:58,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:19:58,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428332409] [2024-10-14 02:19:58,319 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:19:58,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625468310] [2024-10-14 02:19:58,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625468310] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:19:58,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 02:19:58,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-10-14 02:19:58,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879542851] [2024-10-14 02:19:58,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 02:19:58,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-14 02:19:58,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:19:58,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-14 02:19:58,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-10-14 02:19:58,321 INFO L87 Difference]: Start difference. First operand 2779 states and 3900 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 18 states have internal predecessors, (56), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-10-14 02:20:00,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:20:00,685 INFO L93 Difference]: Finished difference Result 4052 states and 5924 transitions. [2024-10-14 02:20:00,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-14 02:20:00,686 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 18 states have internal predecessors, (56), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 91 [2024-10-14 02:20:00,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:20:00,699 INFO L225 Difference]: With dead ends: 4052 [2024-10-14 02:20:00,700 INFO L226 Difference]: Without dead ends: 4048 [2024-10-14 02:20:00,701 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2024-10-14 02:20:00,701 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 161 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-14 02:20:00,701 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 567 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-14 02:20:00,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4048 states. [2024-10-14 02:20:02,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4048 to 3761. [2024-10-14 02:20:02,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3761 states, 2465 states have (on average 1.3509127789046653) internal successors, (3330), 2538 states have internal predecessors, (3330), 1128 states have call successors, (1128), 168 states have call predecessors, (1128), 167 states have return successors, (1122), 1054 states have call predecessors, (1122), 1122 states have call successors, (1122) [2024-10-14 02:20:02,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3761 states to 3761 states and 5580 transitions. [2024-10-14 02:20:02,052 INFO L78 Accepts]: Start accepts. Automaton has 3761 states and 5580 transitions. Word has length 91 [2024-10-14 02:20:02,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:20:02,052 INFO L471 AbstractCegarLoop]: Abstraction has 3761 states and 5580 transitions. [2024-10-14 02:20:02,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 18 states have internal predecessors, (56), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-10-14 02:20:02,053 INFO L276 IsEmpty]: Start isEmpty. Operand 3761 states and 5580 transitions. [2024-10-14 02:20:02,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-10-14 02:20:02,055 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:20:02,055 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:20:02,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-14 02:20:02,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:20:02,257 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:20:02,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:20:02,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1994866066, now seen corresponding path program 2 times [2024-10-14 02:20:02,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:20:02,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524888575] [2024-10-14 02:20:02,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:20:02,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:20:02,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:20:02,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [421284678] [2024-10-14 02:20:02,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 02:20:02,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:20:02,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:20:02,273 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:20:02,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-14 02:20:02,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 02:20:02,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 02:20:02,326 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-10-14 02:20:02,327 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:20:03,101 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 32 proven. 56 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-10-14 02:20:03,102 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:20:06,578 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-10-14 02:20:06,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:20:06,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524888575] [2024-10-14 02:20:06,579 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:20:06,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421284678] [2024-10-14 02:20:06,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421284678] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:20:06,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 02:20:06,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2024-10-14 02:20:06,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180423735] [2024-10-14 02:20:06,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 02:20:06,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-14 02:20:06,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:20:06,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-14 02:20:06,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=896, Unknown=0, NotChecked=0, Total=1056 [2024-10-14 02:20:06,580 INFO L87 Difference]: Start difference. First operand 3761 states and 5580 transitions. Second operand has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 31 states have internal predecessors, (86), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2024-10-14 02:20:12,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 02:20:15,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 02:20:24,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:20:24,509 INFO L93 Difference]: Finished difference Result 4826 states and 7021 transitions. [2024-10-14 02:20:24,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-10-14 02:20:24,510 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 31 states have internal predecessors, (86), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) Word has length 93 [2024-10-14 02:20:24,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:20:24,526 INFO L225 Difference]: With dead ends: 4826 [2024-10-14 02:20:24,526 INFO L226 Difference]: Without dead ends: 4824 [2024-10-14 02:20:24,528 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2663 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=1897, Invalid=7033, Unknown=0, NotChecked=0, Total=8930 [2024-10-14 02:20:24,529 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 530 mSDsluCounter, 1205 mSDsCounter, 0 mSdLazyCounter, 1318 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 1631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 1318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2024-10-14 02:20:24,529 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 1283 Invalid, 1631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 1318 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2024-10-14 02:20:24,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4824 states. [2024-10-14 02:20:26,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4824 to 4369. [2024-10-14 02:20:26,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4369 states, 2997 states have (on average 1.3460126793460128) internal successors, (4034), 3083 states have internal predecessors, (4034), 1170 states have call successors, (1170), 202 states have call predecessors, (1170), 201 states have return successors, (1164), 1083 states have call predecessors, (1164), 1164 states have call successors, (1164) [2024-10-14 02:20:26,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4369 states to 4369 states and 6368 transitions. [2024-10-14 02:20:26,422 INFO L78 Accepts]: Start accepts. Automaton has 4369 states and 6368 transitions. Word has length 93 [2024-10-14 02:20:26,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:20:26,422 INFO L471 AbstractCegarLoop]: Abstraction has 4369 states and 6368 transitions. [2024-10-14 02:20:26,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 31 states have internal predecessors, (86), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2024-10-14 02:20:26,422 INFO L276 IsEmpty]: Start isEmpty. Operand 4369 states and 6368 transitions. [2024-10-14 02:20:26,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-10-14 02:20:26,423 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:20:26,424 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:20:26,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-14 02:20:26,624 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:20:26,624 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:20:26,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:20:26,624 INFO L85 PathProgramCache]: Analyzing trace with hash 607563547, now seen corresponding path program 1 times [2024-10-14 02:20:26,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:20:26,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393316260] [2024-10-14 02:20:26,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:20:26,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:20:26,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:20:26,787 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 02:20:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:20:26,789 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-14 02:20:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:20:26,791 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-14 02:20:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:20:26,792 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-14 02:20:26,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:20:26,793 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-14 02:20:26,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:20:26,795 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-14 02:20:26,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:20:26,797 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-10-14 02:20:26,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:20:26,799 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-10-14 02:20:26,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:20:26,801 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-10-14 02:20:26,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:20:26,804 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-10-14 02:20:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:20:26,807 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-10-14 02:20:26,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:20:26,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393316260] [2024-10-14 02:20:26,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393316260] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 02:20:26,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179212159] [2024-10-14 02:20:26,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:20:26,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:20:26,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:20:26,809 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:20:26,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-14 02:20:26,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:20:26,862 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-14 02:20:26,864 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:20:26,942 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-10-14 02:20:26,942 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:20:27,106 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-10-14 02:20:27,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179212159] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:20:27,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 02:20:27,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 13] total 26 [2024-10-14 02:20:27,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683614239] [2024-10-14 02:20:27,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 02:20:27,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-14 02:20:27,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:20:27,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-14 02:20:27,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=371, Unknown=0, NotChecked=0, Total=650 [2024-10-14 02:20:27,107 INFO L87 Difference]: Start difference. First operand 4369 states and 6368 transitions. Second operand has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 8 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (30), 7 states have call predecessors, (30), 7 states have call successors, (30) [2024-10-14 02:20:32,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:20:32,926 INFO L93 Difference]: Finished difference Result 11846 states and 18417 transitions. [2024-10-14 02:20:32,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-10-14 02:20:32,927 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 8 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (30), 7 states have call predecessors, (30), 7 states have call successors, (30) Word has length 93 [2024-10-14 02:20:32,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:20:32,962 INFO L225 Difference]: With dead ends: 11846 [2024-10-14 02:20:32,962 INFO L226 Difference]: Without dead ends: 10373 [2024-10-14 02:20:32,967 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=628, Invalid=1178, Unknown=0, NotChecked=0, Total=1806 [2024-10-14 02:20:32,967 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 447 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 02:20:32,967 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 472 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 02:20:32,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10373 states. [2024-10-14 02:20:38,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10373 to 9871. [2024-10-14 02:20:38,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9871 states, 6181 states have (on average 1.362886264358518) internal successors, (8424), 6280 states have internal predecessors, (8424), 3336 states have call successors, (3336), 354 states have call predecessors, (3336), 353 states have return successors, (3324), 3236 states have call predecessors, (3324), 3324 states have call successors, (3324) [2024-10-14 02:20:38,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9871 states to 9871 states and 15084 transitions. [2024-10-14 02:20:38,678 INFO L78 Accepts]: Start accepts. Automaton has 9871 states and 15084 transitions. Word has length 93 [2024-10-14 02:20:38,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:20:38,679 INFO L471 AbstractCegarLoop]: Abstraction has 9871 states and 15084 transitions. [2024-10-14 02:20:38,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 8 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (30), 7 states have call predecessors, (30), 7 states have call successors, (30) [2024-10-14 02:20:38,680 INFO L276 IsEmpty]: Start isEmpty. Operand 9871 states and 15084 transitions. [2024-10-14 02:20:38,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-10-14 02:20:38,681 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:20:38,681 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:20:38,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-10-14 02:20:38,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:20:38,886 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:20:38,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:20:38,886 INFO L85 PathProgramCache]: Analyzing trace with hash -2030329448, now seen corresponding path program 2 times [2024-10-14 02:20:38,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:20:38,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961591567] [2024-10-14 02:20:38,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:20:38,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:20:38,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:20:38,997 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 02:20:38,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:20:38,998 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-14 02:20:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:20:39,000 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-14 02:20:39,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:20:39,002 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-14 02:20:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:20:39,003 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-14 02:20:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:20:39,005 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-14 02:20:39,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:20:39,006 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-10-14 02:20:39,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:20:39,008 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-10-14 02:20:39,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:20:39,010 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-10-14 02:20:39,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:20:39,011 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-10-14 02:20:39,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:20:39,013 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2024-10-14 02:20:39,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:20:39,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961591567] [2024-10-14 02:20:39,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961591567] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 02:20:39,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921568431] [2024-10-14 02:20:39,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 02:20:39,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:20:39,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:20:39,015 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:20:39,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-14 02:20:39,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 02:20:39,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 02:20:39,067 INFO L255 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 02:20:39,068 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:20:39,110 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2024-10-14 02:20:39,110 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:20:39,186 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2024-10-14 02:20:39,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921568431] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:20:39,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 02:20:39,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2024-10-14 02:20:39,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578201176] [2024-10-14 02:20:39,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 02:20:39,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-14 02:20:39,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:20:39,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-14 02:20:39,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-10-14 02:20:39,187 INFO L87 Difference]: Start difference. First operand 9871 states and 15084 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-10-14 02:20:46,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:20:46,570 INFO L93 Difference]: Finished difference Result 13462 states and 20829 transitions. [2024-10-14 02:20:46,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-14 02:20:46,570 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 94 [2024-10-14 02:20:46,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:20:46,604 INFO L225 Difference]: With dead ends: 13462 [2024-10-14 02:20:46,604 INFO L226 Difference]: Without dead ends: 12879 [2024-10-14 02:20:46,608 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 208 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2024-10-14 02:20:46,608 INFO L432 NwaCegarLoop]: 74 mSDtfsCounter, 169 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 02:20:46,609 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 586 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 02:20:46,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12879 states. [2024-10-14 02:20:52,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12879 to 10148. [2024-10-14 02:20:52,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10148 states, 6441 states have (on average 1.36065828287533) internal successors, (8764), 6541 states have internal predecessors, (8764), 3353 states have call successors, (3353), 354 states have call predecessors, (3353), 353 states have return successors, (3341), 3252 states have call predecessors, (3341), 3341 states have call successors, (3341) [2024-10-14 02:20:52,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10148 states to 10148 states and 15458 transitions. [2024-10-14 02:20:52,205 INFO L78 Accepts]: Start accepts. Automaton has 10148 states and 15458 transitions. Word has length 94 [2024-10-14 02:20:52,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:20:52,205 INFO L471 AbstractCegarLoop]: Abstraction has 10148 states and 15458 transitions. [2024-10-14 02:20:52,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-10-14 02:20:52,205 INFO L276 IsEmpty]: Start isEmpty. Operand 10148 states and 15458 transitions. [2024-10-14 02:20:52,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-10-14 02:20:52,208 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:20:52,208 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:20:52,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-10-14 02:20:52,408 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-10-14 02:20:52,409 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:20:52,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:20:52,409 INFO L85 PathProgramCache]: Analyzing trace with hash -346973636, now seen corresponding path program 2 times [2024-10-14 02:20:52,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:20:52,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064420928] [2024-10-14 02:20:52,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:20:52,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:20:52,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:20:52,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1805969672] [2024-10-14 02:20:52,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 02:20:52,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:20:52,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:20:52,427 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:20:52,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-14 02:20:52,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 02:20:52,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 02:20:52,519 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-10-14 02:20:52,521 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:20:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 50 proven. 47 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2024-10-14 02:20:53,288 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:20:56,139 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 50 proven. 47 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2024-10-14 02:20:56,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:20:56,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064420928] [2024-10-14 02:20:56,139 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:20:56,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805969672] [2024-10-14 02:20:56,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805969672] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:20:56,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 02:20:56,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2024-10-14 02:20:56,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045616791] [2024-10-14 02:20:56,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 02:20:56,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-14 02:20:56,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:20:56,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-14 02:20:56,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2024-10-14 02:20:56,141 INFO L87 Difference]: Start difference. First operand 10148 states and 15458 transitions. Second operand has 30 states, 28 states have (on average 2.75) internal successors, (77), 29 states have internal predecessors, (77), 10 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26)