./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/hard-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-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 a3d3bea00f90884a75828a52041ade76894eb11b308d280406ab40770bedb299 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-19 21:24:53,028 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 21:24:53,104 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-19 21:24:53,108 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 21:24:53,108 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 21:24:53,128 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 21:24:53,128 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 21:24:53,129 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 21:24:53,129 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 21:24:53,130 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 21:24:53,130 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 21:24:53,130 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 21:24:53,131 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 21:24:53,131 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 21:24:53,132 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 21:24:53,132 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 21:24:53,132 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 21:24:53,133 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 21:24:53,136 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 21:24:53,137 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 21:24:53,137 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 21:24:53,137 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 21:24:53,138 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 21:24:53,138 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 21:24:53,138 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 21:24:53,138 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 21:24:53,138 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 21:24:53,139 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 21:24:53,139 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 21:24:53,139 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 21:24:53,139 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 21:24:53,139 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 21:24:53,140 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 21:24:53,140 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 21:24:53,140 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 21:24:53,140 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 21:24:53,140 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 21:24:53,141 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 21:24:53,141 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 21:24:53,141 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 21:24:53,143 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 21:24:53,143 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 21:24:53,144 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a3d3bea00f90884a75828a52041ade76894eb11b308d280406ab40770bedb299 [2024-11-19 21:24:53,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 21:24:53,405 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 21:24:53,408 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 21:24:53,409 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 21:24:53,410 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 21:24:53,411 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound20.c [2024-11-19 21:24:54,829 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 21:24:55,033 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 21:24:55,034 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound20.c [2024-11-19 21:24:55,043 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/013827861/603ab38f1feb4af782a0fa14a94084e1/FLAG50f040bdb [2024-11-19 21:24:55,055 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/013827861/603ab38f1feb4af782a0fa14a94084e1 [2024-11-19 21:24:55,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 21:24:55,059 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 21:24:55,061 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 21:24:55,061 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 21:24:55,066 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 21:24:55,067 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:24:55" (1/1) ... [2024-11-19 21:24:55,068 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20a793b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:24:55, skipping insertion in model container [2024-11-19 21:24:55,068 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:24:55" (1/1) ... [2024-11-19 21:24:55,086 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 21:24:55,263 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound20.c[538,551] [2024-11-19 21:24:55,288 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 21:24:55,325 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 21:24:55,354 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound20.c[538,551] [2024-11-19 21:24:55,371 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 21:24:55,398 INFO L204 MainTranslator]: Completed translation [2024-11-19 21:24:55,399 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:24:55 WrapperNode [2024-11-19 21:24:55,399 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 21:24:55,400 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 21:24:55,400 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 21:24:55,400 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 21:24:55,412 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:24:55" (1/1) ... [2024-11-19 21:24:55,418 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:24:55" (1/1) ... [2024-11-19 21:24:55,438 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2024-11-19 21:24:55,438 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 21:24:55,439 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 21:24:55,439 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 21:24:55,439 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 21:24:55,448 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:24:55" (1/1) ... [2024-11-19 21:24:55,448 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:24:55" (1/1) ... [2024-11-19 21:24:55,449 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:24:55" (1/1) ... [2024-11-19 21:24:55,466 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-19 21:24:55,466 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:24:55" (1/1) ... [2024-11-19 21:24:55,466 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:24:55" (1/1) ... [2024-11-19 21:24:55,469 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:24:55" (1/1) ... [2024-11-19 21:24:55,472 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:24:55" (1/1) ... [2024-11-19 21:24:55,472 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:24:55" (1/1) ... [2024-11-19 21:24:55,473 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:24:55" (1/1) ... [2024-11-19 21:24:55,475 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 21:24:55,476 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 21:24:55,476 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 21:24:55,476 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 21:24:55,477 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:24:55" (1/1) ... [2024-11-19 21:24:55,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 21:24:55,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:24:55,510 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-19 21:24:55,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-19 21:24:55,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 21:24:55,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 21:24:55,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 21:24:55,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 21:24:55,555 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-19 21:24:55,555 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-19 21:24:55,612 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 21:24:55,614 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 21:24:55,742 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-19 21:24:55,743 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 21:24:55,753 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 21:24:55,753 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-19 21:24:55,754 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:24:55 BoogieIcfgContainer [2024-11-19 21:24:55,754 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 21:24:55,755 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 21:24:55,755 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 21:24:55,758 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 21:24:55,759 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:24:55" (1/3) ... [2024-11-19 21:24:55,759 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@212cfd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:24:55, skipping insertion in model container [2024-11-19 21:24:55,759 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:24:55" (2/3) ... [2024-11-19 21:24:55,760 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@212cfd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:24:55, skipping insertion in model container [2024-11-19 21:24:55,760 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:24:55" (3/3) ... [2024-11-19 21:24:55,761 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound20.c [2024-11-19 21:24:55,778 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 21:24:55,778 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-19 21:24:55,848 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 21:24:55,858 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;@3a72ce1c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 21:24:55,858 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-19 21:24:55,863 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-19 21:24:55,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-19 21:24:55,870 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:24:55,870 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:24:55,871 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:24:55,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:24:55,878 INFO L85 PathProgramCache]: Analyzing trace with hash -712527539, now seen corresponding path program 1 times [2024-11-19 21:24:55,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:24:55,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725987774] [2024-11-19 21:24:55,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:24:55,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:24:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:56,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 21:24:56,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:24:56,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725987774] [2024-11-19 21:24:56,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725987774] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:24:56,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 21:24:56,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 21:24:56,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689764074] [2024-11-19 21:24:56,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:24:56,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-19 21:24:56,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:24:56,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-19 21:24:56,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-19 21:24:56,101 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:24:56,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:24:56,124 INFO L93 Difference]: Finished difference Result 53 states and 87 transitions. [2024-11-19 21:24:56,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-19 21:24:56,126 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-19 21:24:56,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:24:56,134 INFO L225 Difference]: With dead ends: 53 [2024-11-19 21:24:56,135 INFO L226 Difference]: Without dead ends: 24 [2024-11-19 21:24:56,138 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-19 21:24:56,142 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:24:56,143 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:24:56,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-19 21:24:56,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-19 21:24:56,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-19 21:24:56,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2024-11-19 21:24:56,179 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 10 [2024-11-19 21:24:56,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:24:56,180 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2024-11-19 21:24:56,180 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:24:56,180 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2024-11-19 21:24:56,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-19 21:24:56,181 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:24:56,181 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:24:56,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 21:24:56,182 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:24:56,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:24:56,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1983932575, now seen corresponding path program 1 times [2024-11-19 21:24:56,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:24:56,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946536408] [2024-11-19 21:24:56,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:24:56,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:24:56,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 21:24:56,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:24:56,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946536408] [2024-11-19 21:24:56,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946536408] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:24:56,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 21:24:56,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 21:24:56,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186808288] [2024-11-19 21:24:56,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:24:56,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 21:24:56,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:24:56,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 21:24:56,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 21:24:56,414 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:24:56,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:24:56,491 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2024-11-19 21:24:56,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 21:24:56,494 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-19 21:24:56,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:24:56,495 INFO L225 Difference]: With dead ends: 38 [2024-11-19 21:24:56,495 INFO L226 Difference]: Without dead ends: 36 [2024-11-19 21:24:56,495 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-19 21:24:56,496 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 12 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:24:56,497 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 104 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:24:56,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-19 21:24:56,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2024-11-19 21:24:56,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 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) [2024-11-19 21:24:56,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2024-11-19 21:24:56,513 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2024-11-19 21:24:56,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:24:56,514 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2024-11-19 21:24:56,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:24:56,514 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2024-11-19 21:24:56,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-19 21:24:56,517 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:24:56,517 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:24:56,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 21:24:56,517 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:24:56,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:24:56,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1787143384, now seen corresponding path program 1 times [2024-11-19 21:24:56,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:24:56,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058463504] [2024-11-19 21:24:56,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:24:56,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:24:56,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 21:24:56,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:24:56,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058463504] [2024-11-19 21:24:56,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058463504] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:24:56,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 21:24:56,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 21:24:56,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686482885] [2024-11-19 21:24:56,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:24:56,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 21:24:56,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:24:56,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 21:24:56,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 21:24:56,616 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:24:56,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:24:56,640 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2024-11-19 21:24:56,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 21:24:56,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-19 21:24:56,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:24:56,642 INFO L225 Difference]: With dead ends: 44 [2024-11-19 21:24:56,642 INFO L226 Difference]: Without dead ends: 30 [2024-11-19 21:24:56,643 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 21:24:56,644 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:24:56,644 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:24:56,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-19 21:24:56,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-19 21:24:56,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 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) [2024-11-19 21:24:56,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2024-11-19 21:24:56,651 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2024-11-19 21:24:56,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:24:56,652 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2024-11-19 21:24:56,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:24:56,652 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2024-11-19 21:24:56,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-19 21:24:56,653 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:24:56,653 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:24:56,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 21:24:56,653 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:24:56,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:24:56,654 INFO L85 PathProgramCache]: Analyzing trace with hash 472519838, now seen corresponding path program 1 times [2024-11-19 21:24:56,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:24:56,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877482918] [2024-11-19 21:24:56,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:24:56,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:24:56,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:56,790 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-19 21:24:56,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:56,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 21:24:56,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:24:56,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877482918] [2024-11-19 21:24:56,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877482918] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:24:56,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 21:24:56,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 21:24:56,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454282917] [2024-11-19 21:24:56,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:24:56,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 21:24:56,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:24:56,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 21:24:56,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 21:24:56,808 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-19 21:24:56,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:24:56,884 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2024-11-19 21:24:56,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 21:24:56,885 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-11-19 21:24:56,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:24:56,888 INFO L225 Difference]: With dead ends: 44 [2024-11-19 21:24:56,888 INFO L226 Difference]: Without dead ends: 42 [2024-11-19 21:24:56,888 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-19 21:24:56,891 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 12 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:24:56,891 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 101 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:24:56,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-19 21:24:56,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2024-11-19 21:24:56,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-19 21:24:56,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2024-11-19 21:24:56,900 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 15 [2024-11-19 21:24:56,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:24:56,901 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2024-11-19 21:24:56,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-19 21:24:56,901 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2024-11-19 21:24:56,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-19 21:24:56,902 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:24:56,902 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:24:56,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 21:24:56,903 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:24:56,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:24:56,903 INFO L85 PathProgramCache]: Analyzing trace with hash 838495553, now seen corresponding path program 1 times [2024-11-19 21:24:56,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:24:56,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178291211] [2024-11-19 21:24:56,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:24:56,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:24:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:24:56,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752065152] [2024-11-19 21:24:56,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:24:56,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:24:56,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:24:56,934 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:24:56,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 21:24:56,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:56,998 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-19 21:24:57,003 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:24:57,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 21:24:57,118 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 21:24:57,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:24:57,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178291211] [2024-11-19 21:24:57,119 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 21:24:57,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752065152] [2024-11-19 21:24:57,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752065152] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:24:57,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 21:24:57,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 21:24:57,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700718679] [2024-11-19 21:24:57,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:24:57,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 21:24:57,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:24:57,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 21:24:57,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 21:24:57,121 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 21:24:57,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:24:57,186 INFO L93 Difference]: Finished difference Result 63 states and 85 transitions. [2024-11-19 21:24:57,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 21:24:57,187 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2024-11-19 21:24:57,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:24:57,188 INFO L225 Difference]: With dead ends: 63 [2024-11-19 21:24:57,188 INFO L226 Difference]: Without dead ends: 48 [2024-11-19 21:24:57,189 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-19 21:24:57,190 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:24:57,190 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 105 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:24:57,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-19 21:24:57,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-11-19 21:24:57,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 32 states have internal predecessors, (38), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-19 21:24:57,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2024-11-19 21:24:57,203 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 20 [2024-11-19 21:24:57,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:24:57,204 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2024-11-19 21:24:57,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 21:24:57,204 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2024-11-19 21:24:57,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-19 21:24:57,205 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:24:57,205 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:24:57,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 21:24:57,409 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 [2024-11-19 21:24:57,410 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:24:57,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:24:57,410 INFO L85 PathProgramCache]: Analyzing trace with hash 414140572, now seen corresponding path program 1 times [2024-11-19 21:24:57,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:24:57,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196552658] [2024-11-19 21:24:57,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:24:57,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:24:57,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:57,492 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-19 21:24:57,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:57,502 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-19 21:24:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:57,510 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-19 21:24:57,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 21:24:57,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:24:57,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196552658] [2024-11-19 21:24:57,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196552658] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:24:57,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 21:24:57,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 21:24:57,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256869289] [2024-11-19 21:24:57,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:24:57,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 21:24:57,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:24:57,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 21:24:57,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 21:24:57,523 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-19 21:24:57,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:24:57,563 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2024-11-19 21:24:57,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 21:24:57,565 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2024-11-19 21:24:57,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:24:57,566 INFO L225 Difference]: With dead ends: 67 [2024-11-19 21:24:57,566 INFO L226 Difference]: Without dead ends: 60 [2024-11-19 21:24:57,567 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 21:24:57,567 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:24:57,568 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 108 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:24:57,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-19 21:24:57,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-11-19 21:24:57,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 40 states have internal predecessors, (46), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-19 21:24:57,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2024-11-19 21:24:57,587 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 28 [2024-11-19 21:24:57,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:24:57,587 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2024-11-19 21:24:57,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-19 21:24:57,587 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2024-11-19 21:24:57,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-19 21:24:57,588 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:24:57,588 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:24:57,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-19 21:24:57,589 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:24:57,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:24:57,590 INFO L85 PathProgramCache]: Analyzing trace with hash 415868450, now seen corresponding path program 1 times [2024-11-19 21:24:57,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:24:57,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664412387] [2024-11-19 21:24:57,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:24:57,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:24:57,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:24:57,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1610499626] [2024-11-19 21:24:57,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:24:57,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:24:57,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:24:57,613 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:24:57,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 21:24:57,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:57,664 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-19 21:24:57,665 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:24:57,752 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 21:24:57,753 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 21:24:57,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:24:57,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664412387] [2024-11-19 21:24:57,753 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 21:24:57,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610499626] [2024-11-19 21:24:57,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610499626] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:24:57,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 21:24:57,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 21:24:57,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723225485] [2024-11-19 21:24:57,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:24:57,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 21:24:57,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:24:57,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 21:24:57,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 21:24:57,755 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-19 21:24:57,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:24:57,822 INFO L93 Difference]: Finished difference Result 73 states and 88 transitions. [2024-11-19 21:24:57,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 21:24:57,823 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2024-11-19 21:24:57,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:24:57,824 INFO L225 Difference]: With dead ends: 73 [2024-11-19 21:24:57,824 INFO L226 Difference]: Without dead ends: 71 [2024-11-19 21:24:57,825 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-19 21:24:57,825 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:24:57,827 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 85 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:24:57,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-19 21:24:57,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2024-11-19 21:24:57,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 48 states have internal predecessors, (56), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-19 21:24:57,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2024-11-19 21:24:57,867 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 28 [2024-11-19 21:24:57,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:24:57,868 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2024-11-19 21:24:57,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-19 21:24:57,868 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2024-11-19 21:24:57,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-19 21:24:57,869 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:24:57,869 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:24:57,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-19 21:24:58,073 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,SelfDestructingSolverStorable6 [2024-11-19 21:24:58,074 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:24:58,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:24:58,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1091220578, now seen corresponding path program 1 times [2024-11-19 21:24:58,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:24:58,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268031579] [2024-11-19 21:24:58,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:24:58,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:24:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:58,148 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-19 21:24:58,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:58,152 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-19 21:24:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:58,160 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-19 21:24:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:58,169 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-11-19 21:24:58,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:58,172 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-19 21:24:58,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:24:58,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268031579] [2024-11-19 21:24:58,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268031579] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:24:58,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333888653] [2024-11-19 21:24:58,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:24:58,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:24:58,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:24:58,183 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:24:58,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 21:24:58,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:58,250 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-19 21:24:58,252 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:24:58,302 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-19 21:24:58,302 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:24:58,362 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-19 21:24:58,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333888653] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:24:58,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:24:58,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2024-11-19 21:24:58,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185121831] [2024-11-19 21:24:58,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:24:58,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 21:24:58,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:24:58,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 21:24:58,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-19 21:24:58,364 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-19 21:24:58,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:24:58,514 INFO L93 Difference]: Finished difference Result 157 states and 192 transitions. [2024-11-19 21:24:58,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 21:24:58,514 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 35 [2024-11-19 21:24:58,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:24:58,517 INFO L225 Difference]: With dead ends: 157 [2024-11-19 21:24:58,517 INFO L226 Difference]: Without dead ends: 132 [2024-11-19 21:24:58,519 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-19 21:24:58,520 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 54 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 21:24:58,520 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 132 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 21:24:58,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-11-19 21:24:58,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2024-11-19 21:24:58,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 85 states have internal predecessors, (97), 27 states have call successors, (27), 16 states have call predecessors, (27), 16 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-19 21:24:58,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2024-11-19 21:24:58,548 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 35 [2024-11-19 21:24:58,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:24:58,549 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2024-11-19 21:24:58,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-19 21:24:58,549 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2024-11-19 21:24:58,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-19 21:24:58,551 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:24:58,552 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:24:58,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 21:24:58,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:24:58,753 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:24:58,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:24:58,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1884102282, now seen corresponding path program 1 times [2024-11-19 21:24:58,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:24:58,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923006246] [2024-11-19 21:24:58,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:24:58,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:24:58,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:24:58,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1063415052] [2024-11-19 21:24:58,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:24:58,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:24:58,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:24:58,774 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:24:58,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 21:24:58,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:58,817 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-19 21:24:58,819 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:24:58,935 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-19 21:24:58,935 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:24:59,044 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-19 21:24:59,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:24:59,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923006246] [2024-11-19 21:24:59,044 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 21:24:59,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063415052] [2024-11-19 21:24:59,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063415052] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 21:24:59,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 21:24:59,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-19 21:24:59,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908311301] [2024-11-19 21:24:59,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:24:59,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 21:24:59,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:24:59,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 21:24:59,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-19 21:24:59,048 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-19 21:24:59,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:24:59,142 INFO L93 Difference]: Finished difference Result 148 states and 176 transitions. [2024-11-19 21:24:59,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 21:24:59,143 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2024-11-19 21:24:59,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:24:59,144 INFO L225 Difference]: With dead ends: 148 [2024-11-19 21:24:59,144 INFO L226 Difference]: Without dead ends: 142 [2024-11-19 21:24:59,145 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-19 21:24:59,145 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 8 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 21:24:59,145 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 99 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 21:24:59,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-11-19 21:24:59,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 134. [2024-11-19 21:24:59,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 88 states have (on average 1.1704545454545454) internal successors, (103), 92 states have internal predecessors, (103), 28 states have call successors, (28), 18 states have call predecessors, (28), 17 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2024-11-19 21:24:59,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 157 transitions. [2024-11-19 21:24:59,178 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 157 transitions. Word has length 38 [2024-11-19 21:24:59,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:24:59,178 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 157 transitions. [2024-11-19 21:24:59,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-19 21:24:59,178 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 157 transitions. [2024-11-19 21:24:59,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-19 21:24:59,179 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:24:59,179 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 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] [2024-11-19 21:24:59,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-19 21:24:59,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:24:59,386 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:24:59,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:24:59,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1909657797, now seen corresponding path program 1 times [2024-11-19 21:24:59,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:24:59,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834915387] [2024-11-19 21:24:59,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:24:59,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:24:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:59,485 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-19 21:24:59,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:59,491 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-19 21:24:59,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:59,496 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-19 21:24:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:59,502 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-19 21:24:59,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:59,510 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-19 21:24:59,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:59,515 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-11-19 21:24:59,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:59,524 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-19 21:24:59,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:24:59,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834915387] [2024-11-19 21:24:59,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834915387] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:24:59,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 21:24:59,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 21:24:59,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986074000] [2024-11-19 21:24:59,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:24:59,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 21:24:59,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:24:59,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 21:24:59,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 21:24:59,526 INFO L87 Difference]: Start difference. First operand 134 states and 157 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-19 21:24:59,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:24:59,587 INFO L93 Difference]: Finished difference Result 139 states and 161 transitions. [2024-11-19 21:24:59,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 21:24:59,587 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), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2024-11-19 21:24:59,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:24:59,589 INFO L225 Difference]: With dead ends: 139 [2024-11-19 21:24:59,589 INFO L226 Difference]: Without dead ends: 120 [2024-11-19 21:24:59,589 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-19 21:24:59,590 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:24:59,590 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 118 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:24:59,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-19 21:24:59,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2024-11-19 21:24:59,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 79 states have (on average 1.1772151898734178) internal successors, (93), 82 states have internal predecessors, (93), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2024-11-19 21:24:59,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 141 transitions. [2024-11-19 21:24:59,615 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 141 transitions. Word has length 44 [2024-11-19 21:24:59,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:24:59,615 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 141 transitions. [2024-11-19 21:24:59,615 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), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-19 21:24:59,615 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 141 transitions. [2024-11-19 21:24:59,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-19 21:24:59,616 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:24:59,616 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:24:59,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-19 21:24:59,617 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:24:59,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:24:59,617 INFO L85 PathProgramCache]: Analyzing trace with hash -785132454, now seen corresponding path program 1 times [2024-11-19 21:24:59,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:24:59,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898110112] [2024-11-19 21:24:59,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:24:59,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:24:59,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:59,707 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-19 21:24:59,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:59,712 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-19 21:24:59,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:59,716 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-19 21:24:59,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:59,720 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-19 21:24:59,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:59,725 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-19 21:24:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:59,729 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-19 21:24:59,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:59,734 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-19 21:24:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:59,737 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-19 21:24:59,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:24:59,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898110112] [2024-11-19 21:24:59,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898110112] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:24:59,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069624055] [2024-11-19 21:24:59,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:24:59,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:24:59,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:24:59,740 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:24:59,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 21:24:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:24:59,786 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-19 21:24:59,788 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:24:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-19 21:24:59,861 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:24:59,944 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-19 21:24:59,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069624055] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:24:59,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:24:59,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2024-11-19 21:24:59,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597184194] [2024-11-19 21:24:59,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:24:59,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 21:24:59,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:24:59,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 21:24:59,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-19 21:24:59,946 INFO L87 Difference]: Start difference. First operand 120 states and 141 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2024-11-19 21:25:00,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:25:00,105 INFO L93 Difference]: Finished difference Result 243 states and 296 transitions. [2024-11-19 21:25:00,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 21:25:00,105 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) Word has length 51 [2024-11-19 21:25:00,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:25:00,107 INFO L225 Difference]: With dead ends: 243 [2024-11-19 21:25:00,107 INFO L226 Difference]: Without dead ends: 222 [2024-11-19 21:25:00,108 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2024-11-19 21:25:00,108 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 79 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 21:25:00,108 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 185 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 21:25:00,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-11-19 21:25:00,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 215. [2024-11-19 21:25:00,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 140 states have (on average 1.1928571428571428) internal successors, (167), 149 states have internal predecessors, (167), 49 states have call successors, (49), 26 states have call predecessors, (49), 25 states have return successors, (45), 39 states have call predecessors, (45), 45 states have call successors, (45) [2024-11-19 21:25:00,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 261 transitions. [2024-11-19 21:25:00,131 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 261 transitions. Word has length 51 [2024-11-19 21:25:00,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:25:00,132 INFO L471 AbstractCegarLoop]: Abstraction has 215 states and 261 transitions. [2024-11-19 21:25:00,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2024-11-19 21:25:00,132 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 261 transitions. [2024-11-19 21:25:00,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-19 21:25:00,133 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:25:00,133 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:25:00,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 21:25:00,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-19 21:25:00,334 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:25:00,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:25:00,334 INFO L85 PathProgramCache]: Analyzing trace with hash 98519191, now seen corresponding path program 1 times [2024-11-19 21:25:00,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:25:00,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845010841] [2024-11-19 21:25:00,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:25:00,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:25:00,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:25:00,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [767186411] [2024-11-19 21:25:00,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:25:00,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:25:00,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:25:00,376 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:25:00,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 21:25:00,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:00,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-19 21:25:00,430 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:25:01,030 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-11-19 21:25:01,030 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:25:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-11-19 21:25:03,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:25:03,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845010841] [2024-11-19 21:25:03,162 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 21:25:03,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767186411] [2024-11-19 21:25:03,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767186411] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:25:03,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 21:25:03,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2024-11-19 21:25:03,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759717187] [2024-11-19 21:25:03,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 21:25:03,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 21:25:03,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:25:03,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 21:25:03,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-11-19 21:25:03,164 INFO L87 Difference]: Start difference. First operand 215 states and 261 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2024-11-19 21:25:04,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:25:04,303 INFO L93 Difference]: Finished difference Result 379 states and 486 transitions. [2024-11-19 21:25:04,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-19 21:25:04,304 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 60 [2024-11-19 21:25:04,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:25:04,306 INFO L225 Difference]: With dead ends: 379 [2024-11-19 21:25:04,306 INFO L226 Difference]: Without dead ends: 303 [2024-11-19 21:25:04,309 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2024-11-19 21:25:04,309 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 115 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-19 21:25:04,309 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 361 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-19 21:25:04,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2024-11-19 21:25:04,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 265. [2024-11-19 21:25:04,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 178 states have (on average 1.202247191011236) internal successors, (214), 187 states have internal predecessors, (214), 55 states have call successors, (55), 31 states have call predecessors, (55), 31 states have return successors, (52), 46 states have call predecessors, (52), 52 states have call successors, (52) [2024-11-19 21:25:04,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 321 transitions. [2024-11-19 21:25:04,372 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 321 transitions. Word has length 60 [2024-11-19 21:25:04,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:25:04,373 INFO L471 AbstractCegarLoop]: Abstraction has 265 states and 321 transitions. [2024-11-19 21:25:04,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2024-11-19 21:25:04,373 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 321 transitions. [2024-11-19 21:25:04,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-19 21:25:04,374 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:25:04,374 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 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] [2024-11-19 21:25:04,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-19 21:25:04,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:25:04,579 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:25:04,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:25:04,579 INFO L85 PathProgramCache]: Analyzing trace with hash -902942769, now seen corresponding path program 1 times [2024-11-19 21:25:04,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:25:04,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885264314] [2024-11-19 21:25:04,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:25:04,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:25:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:25:04,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1922621530] [2024-11-19 21:25:04,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:25:04,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:25:04,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:25:04,607 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:25:04,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 21:25:04,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:04,661 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-19 21:25:04,667 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:25:05,176 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-19 21:25:05,176 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:25:05,903 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-19 21:25:05,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:25:05,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885264314] [2024-11-19 21:25:05,903 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 21:25:05,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922621530] [2024-11-19 21:25:05,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922621530] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:25:05,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 21:25:05,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2024-11-19 21:25:05,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023044355] [2024-11-19 21:25:05,904 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 21:25:05,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 21:25:05,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:25:05,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 21:25:05,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2024-11-19 21:25:05,907 INFO L87 Difference]: Start difference. First operand 265 states and 321 transitions. Second operand has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 10 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2024-11-19 21:25:06,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:25:06,581 INFO L93 Difference]: Finished difference Result 389 states and 483 transitions. [2024-11-19 21:25:06,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-19 21:25:06,581 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 10 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 71 [2024-11-19 21:25:06,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:25:06,584 INFO L225 Difference]: With dead ends: 389 [2024-11-19 21:25:06,584 INFO L226 Difference]: Without dead ends: 320 [2024-11-19 21:25:06,584 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2024-11-19 21:25:06,585 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 69 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 21:25:06,585 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 519 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-19 21:25:06,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2024-11-19 21:25:06,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 271. [2024-11-19 21:25:06,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 183 states have (on average 1.2021857923497268) internal successors, (220), 188 states have internal predecessors, (220), 56 states have call successors, (56), 32 states have call predecessors, (56), 31 states have return successors, (53), 50 states have call predecessors, (53), 53 states have call successors, (53) [2024-11-19 21:25:06,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 329 transitions. [2024-11-19 21:25:06,651 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 329 transitions. Word has length 71 [2024-11-19 21:25:06,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:25:06,652 INFO L471 AbstractCegarLoop]: Abstraction has 271 states and 329 transitions. [2024-11-19 21:25:06,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 10 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2024-11-19 21:25:06,652 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 329 transitions. [2024-11-19 21:25:06,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-19 21:25:06,653 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:25:06,653 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:25:06,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-19 21:25:06,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:25:06,858 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:25:06,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:25:06,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1932765757, now seen corresponding path program 2 times [2024-11-19 21:25:06,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:25:06,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32727650] [2024-11-19 21:25:06,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:25:06,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:25:06,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:07,017 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-19 21:25:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:07,020 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-19 21:25:07,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:07,022 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-19 21:25:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:07,026 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-19 21:25:07,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:07,032 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-19 21:25:07,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:07,035 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-19 21:25:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:07,042 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-19 21:25:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:07,046 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-19 21:25:07,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:07,050 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-11-19 21:25:07,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:07,055 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-11-19 21:25:07,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:07,058 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-19 21:25:07,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:25:07,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32727650] [2024-11-19 21:25:07,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32727650] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:25:07,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192078705] [2024-11-19 21:25:07,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 21:25:07,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:25:07,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:25:07,061 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:25:07,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 21:25:07,111 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 21:25:07,111 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:25:07,112 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-19 21:25:07,114 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:25:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-19 21:25:07,154 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:25:07,247 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-19 21:25:07,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192078705] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:25:07,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:25:07,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-11-19 21:25:07,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471229504] [2024-11-19 21:25:07,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:25:07,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 21:25:07,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:25:07,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 21:25:07,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 21:25:07,248 INFO L87 Difference]: Start difference. First operand 271 states and 329 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-19 21:25:07,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:25:07,342 INFO L93 Difference]: Finished difference Result 309 states and 376 transitions. [2024-11-19 21:25:07,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 21:25:07,343 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 74 [2024-11-19 21:25:07,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:25:07,345 INFO L225 Difference]: With dead ends: 309 [2024-11-19 21:25:07,345 INFO L226 Difference]: Without dead ends: 256 [2024-11-19 21:25:07,345 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 21:25:07,346 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:25:07,346 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 131 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:25:07,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-11-19 21:25:07,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 248. [2024-11-19 21:25:07,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 169 states have (on average 1.183431952662722) internal successors, (200), 172 states have internal predecessors, (200), 49 states have call successors, (49), 30 states have call predecessors, (49), 29 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2024-11-19 21:25:07,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 296 transitions. [2024-11-19 21:25:07,392 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 296 transitions. Word has length 74 [2024-11-19 21:25:07,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:25:07,392 INFO L471 AbstractCegarLoop]: Abstraction has 248 states and 296 transitions. [2024-11-19 21:25:07,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-19 21:25:07,392 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 296 transitions. [2024-11-19 21:25:07,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-19 21:25:07,393 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:25:07,393 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 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] [2024-11-19 21:25:07,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-19 21:25:07,593 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,SelfDestructingSolverStorable13 [2024-11-19 21:25:07,594 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:25:07,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:25:07,594 INFO L85 PathProgramCache]: Analyzing trace with hash 224462768, now seen corresponding path program 1 times [2024-11-19 21:25:07,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:25:07,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545259491] [2024-11-19 21:25:07,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:25:07,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:25:07,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:07,838 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-19 21:25:07,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:07,843 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-19 21:25:07,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:07,846 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-19 21:25:07,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:07,849 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-19 21:25:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:07,853 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-19 21:25:07,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:07,857 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-19 21:25:07,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:07,860 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-19 21:25:07,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:07,865 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-19 21:25:07,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:07,870 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-11-19 21:25:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:07,873 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-11-19 21:25:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:07,878 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-11-19 21:25:07,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:07,892 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-19 21:25:07,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:25:07,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545259491] [2024-11-19 21:25:07,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545259491] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:25:07,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391180146] [2024-11-19 21:25:07,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:25:07,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:25:07,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:25:07,895 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:25:07,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 21:25:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:07,948 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-19 21:25:07,951 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:25:08,270 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-19 21:25:08,270 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:25:08,650 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-19 21:25:08,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391180146] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:25:08,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:25:08,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 8] total 17 [2024-11-19 21:25:08,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081542653] [2024-11-19 21:25:08,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:25:08,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 21:25:08,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:25:08,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 21:25:08,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-11-19 21:25:08,652 INFO L87 Difference]: Start difference. First operand 248 states and 296 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 15 states have internal predecessors, (49), 9 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2024-11-19 21:25:08,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:25:08,927 INFO L93 Difference]: Finished difference Result 264 states and 319 transitions. [2024-11-19 21:25:08,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 21:25:08,927 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 15 states have internal predecessors, (49), 9 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) Word has length 76 [2024-11-19 21:25:08,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:25:08,929 INFO L225 Difference]: With dead ends: 264 [2024-11-19 21:25:08,929 INFO L226 Difference]: Without dead ends: 239 [2024-11-19 21:25:08,929 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-11-19 21:25:08,930 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 30 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 21:25:08,930 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 395 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 21:25:08,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-11-19 21:25:08,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 229. [2024-11-19 21:25:08,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 156 states have (on average 1.1923076923076923) internal successors, (186), 159 states have internal predecessors, (186), 45 states have call successors, (45), 28 states have call predecessors, (45), 27 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2024-11-19 21:25:08,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 274 transitions. [2024-11-19 21:25:08,973 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 274 transitions. Word has length 76 [2024-11-19 21:25:08,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:25:08,973 INFO L471 AbstractCegarLoop]: Abstraction has 229 states and 274 transitions. [2024-11-19 21:25:08,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 15 states have internal predecessors, (49), 9 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2024-11-19 21:25:08,973 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 274 transitions. [2024-11-19 21:25:08,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-19 21:25:08,974 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:25:08,974 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:25:08,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-19 21:25:09,175 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,SelfDestructingSolverStorable14 [2024-11-19 21:25:09,175 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:25:09,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:25:09,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1653644173, now seen corresponding path program 1 times [2024-11-19 21:25:09,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:25:09,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958143319] [2024-11-19 21:25:09,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:25:09,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:25:09,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:09,234 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-19 21:25:09,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:09,237 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-19 21:25:09,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:09,241 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-19 21:25:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:09,245 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-19 21:25:09,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:09,248 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-19 21:25:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:09,251 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-19 21:25:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:09,253 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-19 21:25:09,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:09,255 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-19 21:25:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:09,265 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-11-19 21:25:09,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:09,268 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-11-19 21:25:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:09,271 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-19 21:25:09,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:09,273 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-11-19 21:25:09,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:09,275 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-11-19 21:25:09,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:25:09,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958143319] [2024-11-19 21:25:09,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958143319] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:25:09,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264502082] [2024-11-19 21:25:09,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:25:09,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:25:09,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:25:09,278 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:25:09,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 21:25:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:09,325 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-19 21:25:09,326 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:25:09,356 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-11-19 21:25:09,356 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 21:25:09,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264502082] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:25:09,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 21:25:09,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2024-11-19 21:25:09,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890230519] [2024-11-19 21:25:09,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:25:09,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 21:25:09,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:25:09,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 21:25:09,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-19 21:25:09,357 INFO L87 Difference]: Start difference. First operand 229 states and 274 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-19 21:25:09,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:25:09,451 INFO L93 Difference]: Finished difference Result 250 states and 300 transitions. [2024-11-19 21:25:09,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 21:25:09,452 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (13), 2 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 80 [2024-11-19 21:25:09,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:25:09,454 INFO L225 Difference]: With dead ends: 250 [2024-11-19 21:25:09,454 INFO L226 Difference]: Without dead ends: 230 [2024-11-19 21:25:09,454 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-19 21:25:09,455 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 17 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:25:09,455 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 109 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:25:09,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2024-11-19 21:25:09,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 222. [2024-11-19 21:25:09,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 152 states have (on average 1.1578947368421053) internal successors, (176), 154 states have internal predecessors, (176), 43 states have call successors, (43), 26 states have call predecessors, (43), 26 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2024-11-19 21:25:09,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 261 transitions. [2024-11-19 21:25:09,493 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 261 transitions. Word has length 80 [2024-11-19 21:25:09,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:25:09,493 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 261 transitions. [2024-11-19 21:25:09,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-19 21:25:09,493 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 261 transitions. [2024-11-19 21:25:09,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-19 21:25:09,494 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:25:09,494 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:25:09,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-19 21:25:09,695 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 [2024-11-19 21:25:09,695 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:25:09,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:25:09,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1315137972, now seen corresponding path program 3 times [2024-11-19 21:25:09,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:25:09,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946784667] [2024-11-19 21:25:09,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:25:09,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:25:09,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:25:09,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136958750] [2024-11-19 21:25:09,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 21:25:09,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:25:09,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:25:09,725 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) [2024-11-19 21:25:09,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 21:25:09,782 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-19 21:25:09,782 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:25:09,783 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-19 21:25:09,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:25:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-19 21:25:10,256 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:25:26,262 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-19 21:25:26,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:25:26,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946784667] [2024-11-19 21:25:26,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 21:25:26,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136958750] [2024-11-19 21:25:26,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136958750] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:25:26,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 21:25:26,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2024-11-19 21:25:26,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161907021] [2024-11-19 21:25:26,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 21:25:26,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-19 21:25:26,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:25:26,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-19 21:25:26,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2024-11-19 21:25:26,265 INFO L87 Difference]: Start difference. First operand 222 states and 261 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2024-11-19 21:25:29,516 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 [] [2024-11-19 21:25:35,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:25:35,822 INFO L93 Difference]: Finished difference Result 296 states and 378 transitions. [2024-11-19 21:25:35,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-19 21:25:35,823 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 92 [2024-11-19 21:25:35,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:25:35,825 INFO L225 Difference]: With dead ends: 296 [2024-11-19 21:25:35,825 INFO L226 Difference]: Without dead ends: 272 [2024-11-19 21:25:35,825 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2024-11-19 21:25:35,826 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 97 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-19 21:25:35,826 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 538 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-19 21:25:35,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2024-11-19 21:25:35,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 250. [2024-11-19 21:25:35,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 168 states have (on average 1.1845238095238095) internal successors, (199), 175 states have internal predecessors, (199), 54 states have call successors, (54), 27 states have call predecessors, (54), 27 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2024-11-19 21:25:35,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 306 transitions. [2024-11-19 21:25:35,888 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 306 transitions. Word has length 92 [2024-11-19 21:25:35,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:25:35,888 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 306 transitions. [2024-11-19 21:25:35,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2024-11-19 21:25:35,889 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 306 transitions. [2024-11-19 21:25:35,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-19 21:25:35,890 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:25:35,890 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:25:35,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-19 21:25:36,094 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 [2024-11-19 21:25:36,095 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:25:36,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:25:36,095 INFO L85 PathProgramCache]: Analyzing trace with hash 57999976, now seen corresponding path program 1 times [2024-11-19 21:25:36,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:25:36,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553311902] [2024-11-19 21:25:36,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:25:36,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:25:36,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:36,253 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-19 21:25:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:36,257 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-19 21:25:36,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:36,261 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-19 21:25:36,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:36,265 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-19 21:25:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:36,268 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-19 21:25:36,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:36,271 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-19 21:25:36,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:36,279 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-19 21:25:36,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:36,283 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-19 21:25:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:36,288 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-11-19 21:25:36,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:36,291 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-11-19 21:25:36,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:36,294 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-19 21:25:36,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:36,301 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-11-19 21:25:36,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:36,306 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-11-19 21:25:36,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:36,309 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-11-19 21:25:36,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:36,311 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-11-19 21:25:36,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:25:36,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553311902] [2024-11-19 21:25:36,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553311902] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:25:36,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439516120] [2024-11-19 21:25:36,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:25:36,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:25:36,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:25:36,315 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) [2024-11-19 21:25:36,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 21:25:36,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:36,372 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-19 21:25:36,374 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:25:36,471 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-19 21:25:36,471 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:25:36,617 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-11-19 21:25:36,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439516120] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:25:36,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:25:36,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2024-11-19 21:25:36,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814494656] [2024-11-19 21:25:36,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:25:36,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 21:25:36,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:25:36,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 21:25:36,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-19 21:25:36,619 INFO L87 Difference]: Start difference. First operand 250 states and 306 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 9 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2024-11-19 21:25:37,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:25:37,038 INFO L93 Difference]: Finished difference Result 632 states and 806 transitions. [2024-11-19 21:25:37,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-19 21:25:37,038 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 9 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) Word has length 98 [2024-11-19 21:25:37,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:25:37,041 INFO L225 Difference]: With dead ends: 632 [2024-11-19 21:25:37,041 INFO L226 Difference]: Without dead ends: 537 [2024-11-19 21:25:37,042 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2024-11-19 21:25:37,043 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 149 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 21:25:37,043 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 197 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 21:25:37,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2024-11-19 21:25:37,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 516. [2024-11-19 21:25:37,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 337 states have (on average 1.2166172106824926) internal successors, (410), 361 states have internal predecessors, (410), 120 states have call successors, (120), 58 states have call predecessors, (120), 58 states have return successors, (115), 96 states have call predecessors, (115), 115 states have call successors, (115) [2024-11-19 21:25:37,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 645 transitions. [2024-11-19 21:25:37,158 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 645 transitions. Word has length 98 [2024-11-19 21:25:37,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:25:37,159 INFO L471 AbstractCegarLoop]: Abstraction has 516 states and 645 transitions. [2024-11-19 21:25:37,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 9 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2024-11-19 21:25:37,159 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 645 transitions. [2024-11-19 21:25:37,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-19 21:25:37,160 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:25:37,160 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:25:37,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-19 21:25:37,364 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 [2024-11-19 21:25:37,365 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:25:37,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:25:37,365 INFO L85 PathProgramCache]: Analyzing trace with hash 900247290, now seen corresponding path program 2 times [2024-11-19 21:25:37,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:25:37,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57747613] [2024-11-19 21:25:37,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:25:37,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:25:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:25:37,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009169424] [2024-11-19 21:25:37,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 21:25:37,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:25:37,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:25:37,413 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) [2024-11-19 21:25:37,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-19 21:25:37,483 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 21:25:37,483 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:25:37,485 INFO L255 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-19 21:25:37,488 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:25:38,357 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 67 proven. 75 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2024-11-19 21:25:38,358 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:25:38,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:25:38,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57747613] [2024-11-19 21:25:38,964 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 21:25:38,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009169424] [2024-11-19 21:25:38,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009169424] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:25:38,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-19 21:25:38,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-19 21:25:38,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122488373] [2024-11-19 21:25:38,965 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-19 21:25:38,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-19 21:25:38,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:25:38,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-19 21:25:38,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2024-11-19 21:25:38,966 INFO L87 Difference]: Start difference. First operand 516 states and 645 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2024-11-19 21:25:39,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:25:39,547 INFO L93 Difference]: Finished difference Result 604 states and 752 transitions. [2024-11-19 21:25:39,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-19 21:25:39,548 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 103 [2024-11-19 21:25:39,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:25:39,552 INFO L225 Difference]: With dead ends: 604 [2024-11-19 21:25:39,552 INFO L226 Difference]: Without dead ends: 526 [2024-11-19 21:25:39,553 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2024-11-19 21:25:39,554 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 7 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-19 21:25:39,554 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 548 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-19 21:25:39,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2024-11-19 21:25:39,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 514. [2024-11-19 21:25:39,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 338 states have (on average 1.2011834319526626) internal successors, (406), 359 states have internal predecessors, (406), 115 states have call successors, (115), 60 states have call predecessors, (115), 60 states have return successors, (111), 94 states have call predecessors, (111), 111 states have call successors, (111) [2024-11-19 21:25:39,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 632 transitions. [2024-11-19 21:25:39,681 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 632 transitions. Word has length 103 [2024-11-19 21:25:39,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:25:39,681 INFO L471 AbstractCegarLoop]: Abstraction has 514 states and 632 transitions. [2024-11-19 21:25:39,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2024-11-19 21:25:39,682 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 632 transitions. [2024-11-19 21:25:39,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-19 21:25:39,683 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:25:39,683 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:25:39,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-19 21:25:39,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:25:39,884 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:25:39,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:25:39,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1093897416, now seen corresponding path program 1 times [2024-11-19 21:25:39,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:25:39,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478937621] [2024-11-19 21:25:39,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:25:39,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:25:39,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:25:39,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372764905] [2024-11-19 21:25:39,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:25:39,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:25:39,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:25:39,942 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) [2024-11-19 21:25:39,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-19 21:25:40,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:40,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-19 21:25:40,018 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:25:40,973 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 58 proven. 84 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2024-11-19 21:25:40,974 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:25:42,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:25:42,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478937621] [2024-11-19 21:25:42,531 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 21:25:42,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372764905] [2024-11-19 21:25:42,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372764905] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:25:42,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-19 21:25:42,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-19 21:25:42,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275072912] [2024-11-19 21:25:42,531 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-19 21:25:42,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-19 21:25:42,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:25:42,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-19 21:25:42,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2024-11-19 21:25:42,533 INFO L87 Difference]: Start difference. First operand 514 states and 632 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2024-11-19 21:25:43,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:25:43,095 INFO L93 Difference]: Finished difference Result 522 states and 640 transitions. [2024-11-19 21:25:43,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-19 21:25:43,096 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 103 [2024-11-19 21:25:43,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:25:43,102 INFO L225 Difference]: With dead ends: 522 [2024-11-19 21:25:43,102 INFO L226 Difference]: Without dead ends: 520 [2024-11-19 21:25:43,103 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2024-11-19 21:25:43,103 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-19 21:25:43,103 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 370 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-19 21:25:43,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2024-11-19 21:25:43,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 512. [2024-11-19 21:25:43,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 337 states have (on average 1.2017804154302671) internal successors, (405), 359 states have internal predecessors, (405), 114 states have call successors, (114), 60 states have call predecessors, (114), 60 states have return successors, (110), 92 states have call predecessors, (110), 110 states have call successors, (110) [2024-11-19 21:25:43,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 629 transitions. [2024-11-19 21:25:43,208 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 629 transitions. Word has length 103 [2024-11-19 21:25:43,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:25:43,209 INFO L471 AbstractCegarLoop]: Abstraction has 512 states and 629 transitions. [2024-11-19 21:25:43,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2024-11-19 21:25:43,209 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 629 transitions. [2024-11-19 21:25:43,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-19 21:25:43,210 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:25:43,210 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:25:43,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-19 21:25:43,414 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:25:43,415 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:25:43,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:25:43,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1090630811, now seen corresponding path program 2 times [2024-11-19 21:25:43,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:25:43,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434351531] [2024-11-19 21:25:43,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:25:43,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:25:43,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:43,819 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-19 21:25:43,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:43,822 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-19 21:25:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:43,828 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-19 21:25:43,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:43,832 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-19 21:25:43,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:43,835 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-19 21:25:43,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:43,838 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-19 21:25:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:43,849 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-19 21:25:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:43,854 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-19 21:25:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:43,858 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-11-19 21:25:43,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:43,861 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-11-19 21:25:43,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:43,865 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-19 21:25:43,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:43,869 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-11-19 21:25:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:43,873 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-11-19 21:25:43,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:43,876 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-11-19 21:25:43,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:43,880 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-11-19 21:25:43,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:43,882 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-11-19 21:25:43,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:43,885 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-11-19 21:25:43,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:25:43,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434351531] [2024-11-19 21:25:43,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434351531] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:25:43,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609754180] [2024-11-19 21:25:43,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 21:25:43,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:25:43,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:25:43,889 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) [2024-11-19 21:25:43,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-19 21:25:43,950 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 21:25:43,950 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:25:43,952 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-19 21:25:43,954 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:25:44,441 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-19 21:25:44,441 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:25:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-19 21:25:45,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609754180] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:25:45,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:25:45,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 12] total 26 [2024-11-19 21:25:45,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171032409] [2024-11-19 21:25:45,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:25:45,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-19 21:25:45,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:25:45,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-19 21:25:45,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2024-11-19 21:25:45,389 INFO L87 Difference]: Start difference. First operand 512 states and 629 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 18 states have call predecessors, (45), 18 states have call successors, (45) [2024-11-19 21:25:46,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:25:46,048 INFO L93 Difference]: Finished difference Result 539 states and 669 transitions. [2024-11-19 21:25:46,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-19 21:25:46,048 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 18 states have call predecessors, (45), 18 states have call successors, (45) Word has length 108 [2024-11-19 21:25:46,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:25:46,052 INFO L225 Difference]: With dead ends: 539 [2024-11-19 21:25:46,052 INFO L226 Difference]: Without dead ends: 483 [2024-11-19 21:25:46,053 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2024-11-19 21:25:46,053 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 34 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 21:25:46,054 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 401 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-19 21:25:46,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2024-11-19 21:25:46,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 468. [2024-11-19 21:25:46,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 306 states have (on average 1.2156862745098038) internal successors, (372), 327 states have internal predecessors, (372), 107 states have call successors, (107), 54 states have call predecessors, (107), 54 states have return successors, (103), 86 states have call predecessors, (103), 103 states have call successors, (103) [2024-11-19 21:25:46,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 582 transitions. [2024-11-19 21:25:46,154 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 582 transitions. Word has length 108 [2024-11-19 21:25:46,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:25:46,155 INFO L471 AbstractCegarLoop]: Abstraction has 468 states and 582 transitions. [2024-11-19 21:25:46,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 18 states have call predecessors, (45), 18 states have call successors, (45) [2024-11-19 21:25:46,155 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 582 transitions. [2024-11-19 21:25:46,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-19 21:25:46,156 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:25:46,156 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:25:46,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-19 21:25:46,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:25:46,357 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:25:46,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:25:46,357 INFO L85 PathProgramCache]: Analyzing trace with hash -353318641, now seen corresponding path program 1 times [2024-11-19 21:25:46,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:25:46,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551692870] [2024-11-19 21:25:46,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:25:46,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:25:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:46,544 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-19 21:25:46,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:46,547 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-19 21:25:46,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:46,550 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-19 21:25:46,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:46,553 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-19 21:25:46,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:46,555 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-19 21:25:46,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:46,558 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-19 21:25:46,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:46,561 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-19 21:25:46,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:46,565 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-19 21:25:46,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:46,569 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-11-19 21:25:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:46,573 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-11-19 21:25:46,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:46,575 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-19 21:25:46,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:46,581 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-11-19 21:25:46,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:46,584 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-11-19 21:25:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:46,587 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-11-19 21:25:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:46,589 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-11-19 21:25:46,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:46,593 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-11-19 21:25:46,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:46,596 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 32 proven. 46 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-11-19 21:25:46,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:25:46,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551692870] [2024-11-19 21:25:46,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551692870] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:25:46,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272569492] [2024-11-19 21:25:46,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:25:46,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:25:46,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:25:46,599 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) [2024-11-19 21:25:46,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-19 21:25:46,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:46,669 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-19 21:25:46,671 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:25:46,789 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 32 proven. 470 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-19 21:25:46,789 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:25:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 32 proven. 46 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-11-19 21:25:46,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272569492] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:25:46,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:25:46,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2024-11-19 21:25:46,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201090066] [2024-11-19 21:25:46,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:25:46,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 21:25:46,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:25:46,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 21:25:46,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2024-11-19 21:25:46,984 INFO L87 Difference]: Start difference. First operand 468 states and 582 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 13 states have call successors, (49), 8 states have call predecessors, (49), 7 states have return successors, (48), 12 states have call predecessors, (48), 12 states have call successors, (48) [2024-11-19 21:25:47,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:25:47,595 INFO L93 Difference]: Finished difference Result 842 states and 1077 transitions. [2024-11-19 21:25:47,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-19 21:25:47,598 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 13 states have call successors, (49), 8 states have call predecessors, (49), 7 states have return successors, (48), 12 states have call predecessors, (48), 12 states have call successors, (48) Word has length 110 [2024-11-19 21:25:47,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:25:47,605 INFO L225 Difference]: With dead ends: 842 [2024-11-19 21:25:47,606 INFO L226 Difference]: Without dead ends: 796 [2024-11-19 21:25:47,608 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2024-11-19 21:25:47,608 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 209 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 21:25:47,608 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 258 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-19 21:25:47,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2024-11-19 21:25:47,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 781. [2024-11-19 21:25:47,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 519 states have (on average 1.163776493256262) internal successors, (604), 551 states have internal predecessors, (604), 182 states have call successors, (182), 79 states have call predecessors, (182), 79 states have return successors, (174), 150 states have call predecessors, (174), 174 states have call successors, (174) [2024-11-19 21:25:47,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 960 transitions. [2024-11-19 21:25:47,810 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 960 transitions. Word has length 110 [2024-11-19 21:25:47,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:25:47,811 INFO L471 AbstractCegarLoop]: Abstraction has 781 states and 960 transitions. [2024-11-19 21:25:47,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 13 states have call successors, (49), 8 states have call predecessors, (49), 7 states have return successors, (48), 12 states have call predecessors, (48), 12 states have call successors, (48) [2024-11-19 21:25:47,812 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 960 transitions. [2024-11-19 21:25:47,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-11-19 21:25:47,814 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:25:47,815 INFO L215 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:25:47,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-19 21:25:48,015 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,SelfDestructingSolverStorable21 [2024-11-19 21:25:48,015 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:25:48,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:25:48,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1977071855, now seen corresponding path program 3 times [2024-11-19 21:25:48,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:25:48,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094243543] [2024-11-19 21:25:48,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:25:48,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:25:48,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:48,180 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-19 21:25:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:48,183 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-19 21:25:48,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:48,186 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-19 21:25:48,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:48,193 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-19 21:25:48,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:48,200 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-19 21:25:48,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:48,203 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-19 21:25:48,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:48,207 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-19 21:25:48,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:48,210 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-19 21:25:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:48,213 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-11-19 21:25:48,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:48,217 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-11-19 21:25:48,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:48,219 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-19 21:25:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:48,222 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-11-19 21:25:48,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:48,226 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-11-19 21:25:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:48,232 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-11-19 21:25:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:48,237 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-11-19 21:25:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:48,240 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-11-19 21:25:48,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:48,246 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-11-19 21:25:48,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:48,250 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-11-19 21:25:48,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:25:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 54 proven. 34 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-11-19 21:25:48,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:25:48,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094243543] [2024-11-19 21:25:48,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094243543] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:25:48,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748726979] [2024-11-19 21:25:48,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 21:25:48,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:25:48,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:25:48,259 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) [2024-11-19 21:25:48,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-19 21:25:48,325 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-19 21:25:48,325 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:25:48,327 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-19 21:25:48,330 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:25:48,533 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 148 proven. 47 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2024-11-19 21:25:48,533 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:25:48,714 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2024-11-19 21:25:48,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748726979] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:25:48,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:25:48,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 8] total 18 [2024-11-19 21:25:48,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316383723] [2024-11-19 21:25:48,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:25:48,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 21:25:48,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:25:48,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 21:25:48,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2024-11-19 21:25:48,716 INFO L87 Difference]: Start difference. First operand 781 states and 960 transitions. Second operand has 18 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 10 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 7 states have call successors, (30) [2024-11-19 21:25:49,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:25:49,865 INFO L93 Difference]: Finished difference Result 955 states and 1152 transitions. [2024-11-19 21:25:49,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-19 21:25:49,866 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 10 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 7 states have call successors, (30) Word has length 121 [2024-11-19 21:25:49,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:25:49,870 INFO L225 Difference]: With dead ends: 955 [2024-11-19 21:25:49,871 INFO L226 Difference]: Without dead ends: 900 [2024-11-19 21:25:49,872 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=281, Invalid=1201, Unknown=0, NotChecked=0, Total=1482 [2024-11-19 21:25:49,872 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 80 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-19 21:25:49,872 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 705 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-19 21:25:49,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2024-11-19 21:25:50,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 863. [2024-11-19 21:25:50,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 587 states have (on average 1.1345826235093697) internal successors, (666), 602 states have internal predecessors, (666), 176 states have call successors, (176), 99 states have call predecessors, (176), 99 states have return successors, (169), 161 states have call predecessors, (169), 169 states have call successors, (169) [2024-11-19 21:25:50,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1011 transitions. [2024-11-19 21:25:50,088 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1011 transitions. Word has length 121 [2024-11-19 21:25:50,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:25:50,089 INFO L471 AbstractCegarLoop]: Abstraction has 863 states and 1011 transitions. [2024-11-19 21:25:50,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 10 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 7 states have call successors, (30) [2024-11-19 21:25:50,089 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1011 transitions. [2024-11-19 21:25:50,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-19 21:25:50,091 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:25:50,092 INFO L215 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:25:50,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-19 21:25:50,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:25:50,296 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:25:50,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:25:50,296 INFO L85 PathProgramCache]: Analyzing trace with hash 488955713, now seen corresponding path program 4 times [2024-11-19 21:25:50,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:25:50,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281976496] [2024-11-19 21:25:50,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:25:50,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:25:50,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:25:50,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313848033] [2024-11-19 21:25:50,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 21:25:50,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:25:50,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:25:50,353 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) [2024-11-19 21:25:50,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-19 21:25:50,439 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 21:25:50,440 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:25:50,447 INFO L255 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-19 21:25:50,450 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:25:51,347 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 65 proven. 85 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-11-19 21:25:51,347 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:26:21,123 WARN L286 SmtUtils]: Spent 5.60s on a formula simplification that was a NOOP. DAG size: 393 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)