./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array13_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-patterns/array13_pattern.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 78699f7813351c3df7f7fcab3bf98fffd7a92c5cc679034a9d139e9169232d7e --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 09:17:02,313 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 09:17:02,379 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 09:17:02,384 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 09:17:02,385 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 09:17:02,415 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 09:17:02,417 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 09:17:02,417 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 09:17:02,418 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 09:17:02,419 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 09:17:02,420 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 09:17:02,421 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 09:17:02,421 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 09:17:02,421 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 09:17:02,422 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 09:17:02,423 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 09:17:02,424 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 09:17:02,424 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 09:17:02,426 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 09:17:02,426 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 09:17:02,427 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 09:17:02,427 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 09:17:02,427 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 09:17:02,427 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 09:17:02,428 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 09:17:02,428 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 09:17:02,428 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 09:17:02,428 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 09:17:02,428 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 09:17:02,429 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 09:17:02,429 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 09:17:02,429 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 09:17:02,429 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 09:17:02,430 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 09:17:02,430 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 09:17:02,430 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 09:17:02,432 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 09:17:02,432 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 09:17:02,432 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 09:17:02,433 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 09:17:02,433 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 09:17:02,434 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 09:17:02,434 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78699f7813351c3df7f7fcab3bf98fffd7a92c5cc679034a9d139e9169232d7e [2024-11-18 09:17:02,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 09:17:02,752 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 09:17:02,754 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 09:17:02,755 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 09:17:02,756 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 09:17:02,756 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array13_pattern.c [2024-11-18 09:17:04,133 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 09:17:04,318 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 09:17:04,318 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array13_pattern.c [2024-11-18 09:17:04,326 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25997dcfa/53ec5e156a804a918210eddbb8ef4ba4/FLAG6dbf67e6c [2024-11-18 09:17:04,705 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25997dcfa/53ec5e156a804a918210eddbb8ef4ba4 [2024-11-18 09:17:04,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 09:17:04,711 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 09:17:04,712 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 09:17:04,714 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 09:17:04,719 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 09:17:04,720 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:17:04" (1/1) ... [2024-11-18 09:17:04,721 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c8ab0d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:17:04, skipping insertion in model container [2024-11-18 09:17:04,721 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:17:04" (1/1) ... [2024-11-18 09:17:04,746 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 09:17:04,926 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/array-patterns/array13_pattern.c[1342,1355] [2024-11-18 09:17:04,952 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 09:17:04,961 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 09:17:04,975 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/array-patterns/array13_pattern.c[1342,1355] [2024-11-18 09:17:04,992 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 09:17:05,011 INFO L204 MainTranslator]: Completed translation [2024-11-18 09:17:05,012 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:17:05 WrapperNode [2024-11-18 09:17:05,013 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 09:17:05,014 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 09:17:05,014 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 09:17:05,015 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 09:17:05,022 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:17:05" (1/1) ... [2024-11-18 09:17:05,033 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:17:05" (1/1) ... [2024-11-18 09:17:05,062 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 97 [2024-11-18 09:17:05,062 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 09:17:05,063 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 09:17:05,063 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 09:17:05,063 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 09:17:05,075 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:17:05" (1/1) ... [2024-11-18 09:17:05,075 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:17:05" (1/1) ... [2024-11-18 09:17:05,077 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:17:05" (1/1) ... [2024-11-18 09:17:05,095 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-18 09:17:05,099 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:17:05" (1/1) ... [2024-11-18 09:17:05,099 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:17:05" (1/1) ... [2024-11-18 09:17:05,105 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:17:05" (1/1) ... [2024-11-18 09:17:05,112 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:17:05" (1/1) ... [2024-11-18 09:17:05,117 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:17:05" (1/1) ... [2024-11-18 09:17:05,118 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:17:05" (1/1) ... [2024-11-18 09:17:05,120 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 09:17:05,125 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 09:17:05,125 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 09:17:05,125 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 09:17:05,126 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:17:05" (1/1) ... [2024-11-18 09:17:05,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 09:17:05,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:17:05,161 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) [2024-11-18 09:17:05,164 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 [2024-11-18 09:17:05,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 09:17:05,202 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-18 09:17:05,202 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-18 09:17:05,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 09:17:05,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-18 09:17:05,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-18 09:17:05,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-18 09:17:05,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-18 09:17:05,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 09:17:05,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 09:17:05,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-18 09:17:05,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-18 09:17:05,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-18 09:17:05,279 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 09:17:05,281 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 09:17:05,467 INFO L? ?]: Removed 18 outVars from TransFormulas that were not future-live. [2024-11-18 09:17:05,467 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 09:17:05,479 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 09:17:05,480 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-18 09:17:05,480 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:17:05 BoogieIcfgContainer [2024-11-18 09:17:05,480 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 09:17:05,482 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 09:17:05,482 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 09:17:05,486 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 09:17:05,486 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 09:17:04" (1/3) ... [2024-11-18 09:17:05,488 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37947255 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:17:05, skipping insertion in model container [2024-11-18 09:17:05,488 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:17:05" (2/3) ... [2024-11-18 09:17:05,489 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37947255 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:17:05, skipping insertion in model container [2024-11-18 09:17:05,489 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:17:05" (3/3) ... [2024-11-18 09:17:05,491 INFO L112 eAbstractionObserver]: Analyzing ICFG array13_pattern.c [2024-11-18 09:17:05,505 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 09:17:05,505 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 09:17:05,555 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 09:17:05,560 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;@74e9d8b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 09:17:05,561 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 09:17:05,564 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 09:17:05,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-18 09:17:05,569 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:17:05,570 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:17:05,570 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:17:05,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:17:05,574 INFO L85 PathProgramCache]: Analyzing trace with hash -152131175, now seen corresponding path program 1 times [2024-11-18 09:17:05,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:17:05,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413132276] [2024-11-18 09:17:05,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:17:05,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:17:05,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:17:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:17:05,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:17:05,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413132276] [2024-11-18 09:17:05,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413132276] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 09:17:05,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 09:17:05,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-18 09:17:05,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746907797] [2024-11-18 09:17:05,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 09:17:05,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-18 09:17:05,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:17:05,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-18 09:17:05,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-18 09:17:05,753 INFO L87 Difference]: Start difference. First operand has 31 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-18 09:17:05,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:17:05,768 INFO L93 Difference]: Finished difference Result 59 states and 91 transitions. [2024-11-18 09:17:05,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-18 09:17:05,770 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-11-18 09:17:05,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:17:05,775 INFO L225 Difference]: With dead ends: 59 [2024-11-18 09:17:05,775 INFO L226 Difference]: Without dead ends: 27 [2024-11-18 09:17:05,777 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 [2024-11-18 09:17:05,780 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 [2024-11-18 09:17:05,781 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] [2024-11-18 09:17:05,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-18 09:17:05,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-18 09:17:05,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 09:17:05,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-11-18 09:17:05,811 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 15 [2024-11-18 09:17:05,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:17:05,812 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-11-18 09:17:05,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-18 09:17:05,812 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-11-18 09:17:05,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-18 09:17:05,814 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:17:05,814 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:17:05,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-18 09:17:05,814 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:17:05,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:17:05,815 INFO L85 PathProgramCache]: Analyzing trace with hash -2136147464, now seen corresponding path program 1 times [2024-11-18 09:17:05,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:17:05,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208580739] [2024-11-18 09:17:05,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:17:05,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:17:05,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:17:06,183 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-18 09:17:06,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:17:06,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208580739] [2024-11-18 09:17:06,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208580739] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:17:06,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279926600] [2024-11-18 09:17:06,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:17:06,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:17:06,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:17:06,189 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) [2024-11-18 09:17:06,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-18 09:17:06,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:17:06,279 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-18 09:17:06,287 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:17:06,412 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-18 09:17:06,412 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-18 09:17:06,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279926600] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 09:17:06,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-18 09:17:06,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2024-11-18 09:17:06,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975368044] [2024-11-18 09:17:06,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 09:17:06,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-18 09:17:06,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:17:06,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-18 09:17:06,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-18 09:17:06,418 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-18 09:17:06,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:17:06,502 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2024-11-18 09:17:06,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 09:17:06,503 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2024-11-18 09:17:06,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:17:06,505 INFO L225 Difference]: With dead ends: 64 [2024-11-18 09:17:06,505 INFO L226 Difference]: Without dead ends: 39 [2024-11-18 09:17:06,506 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-18 09:17:06,507 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 09:17:06,509 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 72 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 09:17:06,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-18 09:17:06,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2024-11-18 09:17:06,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 09:17:06,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2024-11-18 09:17:06,516 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 28 [2024-11-18 09:17:06,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:17:06,519 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2024-11-18 09:17:06,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-18 09:17:06,520 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2024-11-18 09:17:06,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-18 09:17:06,521 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:17:06,521 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:17:06,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-18 09:17:06,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:17:06,722 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:17:06,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:17:06,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1062070342, now seen corresponding path program 1 times [2024-11-18 09:17:06,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:17:06,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566856895] [2024-11-18 09:17:06,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:17:06,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:17:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:17:06,854 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-18 09:17:06,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:17:06,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566856895] [2024-11-18 09:17:06,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566856895] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 09:17:06,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 09:17:06,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-18 09:17:06,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682018274] [2024-11-18 09:17:06,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 09:17:06,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-18 09:17:06,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:17:06,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-18 09:17:06,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-18 09:17:06,861 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-18 09:17:06,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:17:06,903 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2024-11-18 09:17:06,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-18 09:17:06,903 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2024-11-18 09:17:06,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:17:06,904 INFO L225 Difference]: With dead ends: 62 [2024-11-18 09:17:06,904 INFO L226 Difference]: Without dead ends: 39 [2024-11-18 09:17:06,905 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-18 09:17:06,906 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 13 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 09:17:06,906 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 48 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 09:17:06,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-18 09:17:06,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2024-11-18 09:17:06,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 09:17:06,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2024-11-18 09:17:06,913 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 31 [2024-11-18 09:17:06,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:17:06,914 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2024-11-18 09:17:06,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-18 09:17:06,914 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2024-11-18 09:17:06,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-18 09:17:06,915 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:17:06,915 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:17:06,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-18 09:17:06,916 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:17:06,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:17:06,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1662239748, now seen corresponding path program 1 times [2024-11-18 09:17:06,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:17:06,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401360242] [2024-11-18 09:17:06,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:17:06,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:17:06,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:17:07,045 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-18 09:17:07,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:17:07,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401360242] [2024-11-18 09:17:07,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401360242] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:17:07,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181193668] [2024-11-18 09:17:07,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:17:07,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:17:07,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:17:07,052 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) [2024-11-18 09:17:07,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-18 09:17:07,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:17:07,179 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-18 09:17:07,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:17:07,248 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-18 09:17:07,252 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:17:07,329 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-18 09:17:07,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181193668] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:17:07,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:17:07,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-11-18 09:17:07,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117371982] [2024-11-18 09:17:07,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:17:07,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-18 09:17:07,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:17:07,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-18 09:17:07,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-18 09:17:07,331 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 09:17:07,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:17:07,438 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2024-11-18 09:17:07,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-18 09:17:07,439 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2024-11-18 09:17:07,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:17:07,440 INFO L225 Difference]: With dead ends: 45 [2024-11-18 09:17:07,440 INFO L226 Difference]: Without dead ends: 41 [2024-11-18 09:17:07,440 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-18 09:17:07,442 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 38 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 09:17:07,443 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 60 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 09:17:07,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-18 09:17:07,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2024-11-18 09:17:07,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 09:17:07,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2024-11-18 09:17:07,454 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 33 [2024-11-18 09:17:07,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:17:07,454 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2024-11-18 09:17:07,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 09:17:07,455 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2024-11-18 09:17:07,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-18 09:17:07,457 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:17:07,457 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:17:07,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-18 09:17:07,661 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,SelfDestructingSolverStorable3 [2024-11-18 09:17:07,662 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:17:07,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:17:07,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1380575367, now seen corresponding path program 1 times [2024-11-18 09:17:07,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:17:07,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189476713] [2024-11-18 09:17:07,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:17:07,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:17:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:17:07,942 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-18 09:17:07,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:17:07,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189476713] [2024-11-18 09:17:07,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189476713] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:17:07,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693427528] [2024-11-18 09:17:07,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:17:07,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:17:07,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:17:07,946 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) [2024-11-18 09:17:07,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-18 09:17:08,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:17:08,015 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-18 09:17:08,017 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:17:08,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-18 09:17:08,186 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:17:08,464 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-18 09:17:08,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693427528] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:17:08,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:17:08,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 11] total 23 [2024-11-18 09:17:08,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897062305] [2024-11-18 09:17:08,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:17:08,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-18 09:17:08,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:17:08,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-18 09:17:08,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2024-11-18 09:17:08,468 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 23 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 16 states have internal predecessors, (46), 6 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-18 09:17:09,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:17:09,217 INFO L93 Difference]: Finished difference Result 162 states and 204 transitions. [2024-11-18 09:17:09,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-18 09:17:09,217 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 16 states have internal predecessors, (46), 6 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 38 [2024-11-18 09:17:09,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:17:09,221 INFO L225 Difference]: With dead ends: 162 [2024-11-18 09:17:09,222 INFO L226 Difference]: Without dead ends: 137 [2024-11-18 09:17:09,223 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=342, Invalid=1298, Unknown=0, NotChecked=0, Total=1640 [2024-11-18 09:17:09,225 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 183 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 09:17:09,229 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 291 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 09:17:09,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-18 09:17:09,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 75. [2024-11-18 09:17:09,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 64 states have (on average 1.296875) internal successors, (83), 65 states have internal predecessors, (83), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-18 09:17:09,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 95 transitions. [2024-11-18 09:17:09,252 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 95 transitions. Word has length 38 [2024-11-18 09:17:09,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:17:09,253 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 95 transitions. [2024-11-18 09:17:09,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 16 states have internal predecessors, (46), 6 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-18 09:17:09,254 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 95 transitions. [2024-11-18 09:17:09,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-18 09:17:09,255 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:17:09,255 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:17:09,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-18 09:17:09,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:17:09,460 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:17:09,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:17:09,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1967381381, now seen corresponding path program 1 times [2024-11-18 09:17:09,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:17:09,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986288923] [2024-11-18 09:17:09,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:17:09,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:17:09,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-18 09:17:09,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046794871] [2024-11-18 09:17:09,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:17:09,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:17:09,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:17:09,497 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) [2024-11-18 09:17:09,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-18 09:17:09,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:17:09,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-18 09:17:09,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:17:09,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-18 09:17:09,951 INFO L349 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2024-11-18 09:17:09,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 24 [2024-11-18 09:17:10,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-18 09:17:10,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 09:17:10,072 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:17:11,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2024-11-18 09:17:11,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 46 [2024-11-18 09:17:11,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-18 09:17:11,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:17:11,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986288923] [2024-11-18 09:17:11,627 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 09:17:11,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046794871] [2024-11-18 09:17:11,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046794871] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:17:11,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-18 09:17:11,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2024-11-18 09:17:11,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292542040] [2024-11-18 09:17:11,628 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-18 09:17:11,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-18 09:17:11,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:17:11,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-18 09:17:11,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2024-11-18 09:17:11,630 INFO L87 Difference]: Start difference. First operand 75 states and 95 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-18 09:17:14,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:17:14,806 INFO L93 Difference]: Finished difference Result 198 states and 251 transitions. [2024-11-18 09:17:14,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-18 09:17:14,807 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2024-11-18 09:17:14,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:17:14,809 INFO L225 Difference]: With dead ends: 198 [2024-11-18 09:17:14,809 INFO L226 Difference]: Without dead ends: 158 [2024-11-18 09:17:14,814 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=601, Invalid=2591, Unknown=0, NotChecked=0, Total=3192 [2024-11-18 09:17:14,814 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 202 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-18 09:17:14,816 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 182 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-18 09:17:14,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-11-18 09:17:14,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 125. [2024-11-18 09:17:14,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 107 states have (on average 1.280373831775701) internal successors, (137), 109 states have internal predecessors, (137), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-18 09:17:14,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 159 transitions. [2024-11-18 09:17:14,852 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 159 transitions. Word has length 38 [2024-11-18 09:17:14,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:17:14,852 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 159 transitions. [2024-11-18 09:17:14,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-18 09:17:14,853 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 159 transitions. [2024-11-18 09:17:14,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-18 09:17:14,854 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:17:14,854 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:17:14,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-18 09:17:15,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:17:15,055 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:17:15,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:17:15,056 INFO L85 PathProgramCache]: Analyzing trace with hash -707639139, now seen corresponding path program 2 times [2024-11-18 09:17:15,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:17:15,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006427280] [2024-11-18 09:17:15,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 09:17:15,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:17:15,076 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 09:17:15,076 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:17:15,154 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-18 09:17:15,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:17:15,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006427280] [2024-11-18 09:17:15,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006427280] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:17:15,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716692727] [2024-11-18 09:17:15,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 09:17:15,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:17:15,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:17:15,159 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) [2024-11-18 09:17:15,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-18 09:17:15,225 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 09:17:15,225 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:17:15,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-18 09:17:15,228 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:17:15,284 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 09:17:15,284 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:17:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-18 09:17:15,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716692727] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:17:15,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:17:15,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-18 09:17:15,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976817612] [2024-11-18 09:17:15,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:17:15,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-18 09:17:15,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:17:15,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-18 09:17:15,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-18 09:17:15,342 INFO L87 Difference]: Start difference. First operand 125 states and 159 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 09:17:15,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:17:15,460 INFO L93 Difference]: Finished difference Result 183 states and 227 transitions. [2024-11-18 09:17:15,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-18 09:17:15,461 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2024-11-18 09:17:15,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:17:15,462 INFO L225 Difference]: With dead ends: 183 [2024-11-18 09:17:15,462 INFO L226 Difference]: Without dead ends: 102 [2024-11-18 09:17:15,463 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-11-18 09:17:15,463 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 16 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 09:17:15,464 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 103 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 09:17:15,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-18 09:17:15,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2024-11-18 09:17:15,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 83 states have (on average 1.2530120481927711) internal successors, (104), 84 states have internal predecessors, (104), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-18 09:17:15,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 120 transitions. [2024-11-18 09:17:15,489 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 120 transitions. Word has length 40 [2024-11-18 09:17:15,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:17:15,490 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 120 transitions. [2024-11-18 09:17:15,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 09:17:15,490 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 120 transitions. [2024-11-18 09:17:15,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-18 09:17:15,491 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:17:15,492 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:17:15,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-18 09:17:15,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:17:15,696 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:17:15,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:17:15,696 INFO L85 PathProgramCache]: Analyzing trace with hash -291961609, now seen corresponding path program 2 times [2024-11-18 09:17:15,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:17:15,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729459985] [2024-11-18 09:17:15,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 09:17:15,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:17:15,717 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 09:17:15,717 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:17:15,796 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-18 09:17:15,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:17:15,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729459985] [2024-11-18 09:17:15,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729459985] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:17:15,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696977682] [2024-11-18 09:17:15,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 09:17:15,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:17:15,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:17:15,800 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) [2024-11-18 09:17:15,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-18 09:17:15,862 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 09:17:15,862 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:17:15,863 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-18 09:17:15,864 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:17:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-18 09:17:15,932 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:17:15,987 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-18 09:17:15,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696977682] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:17:15,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:17:15,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-18 09:17:15,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917971825] [2024-11-18 09:17:15,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:17:15,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-18 09:17:15,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:17:15,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-18 09:17:15,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-11-18 09:17:15,989 INFO L87 Difference]: Start difference. First operand 96 states and 120 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 09:17:16,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:17:16,174 INFO L93 Difference]: Finished difference Result 168 states and 218 transitions. [2024-11-18 09:17:16,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-18 09:17:16,175 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2024-11-18 09:17:16,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:17:16,176 INFO L225 Difference]: With dead ends: 168 [2024-11-18 09:17:16,176 INFO L226 Difference]: Without dead ends: 122 [2024-11-18 09:17:16,177 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2024-11-18 09:17:16,177 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 09:17:16,178 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 146 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 09:17:16,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-18 09:17:16,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 106. [2024-11-18 09:17:16,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 93 states have (on average 1.2580645161290323) internal successors, (117), 94 states have internal predecessors, (117), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-18 09:17:16,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 133 transitions. [2024-11-18 09:17:16,203 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 133 transitions. Word has length 40 [2024-11-18 09:17:16,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:17:16,204 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 133 transitions. [2024-11-18 09:17:16,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 09:17:16,204 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 133 transitions. [2024-11-18 09:17:16,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-18 09:17:16,206 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:17:16,206 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:17:16,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-18 09:17:16,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:17:16,407 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:17:16,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:17:16,407 INFO L85 PathProgramCache]: Analyzing trace with hash 441313725, now seen corresponding path program 3 times [2024-11-18 09:17:16,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:17:16,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699836073] [2024-11-18 09:17:16,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 09:17:16,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:17:16,438 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-18 09:17:16,440 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:17:16,602 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-18 09:17:16,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:17:16,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699836073] [2024-11-18 09:17:16,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699836073] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:17:16,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021308009] [2024-11-18 09:17:16,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 09:17:16,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:17:16,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:17:16,605 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) [2024-11-18 09:17:16,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-18 09:17:16,662 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-18 09:17:16,662 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:17:16,663 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-18 09:17:16,664 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:17:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-18 09:17:16,777 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:17:16,953 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-18 09:17:16,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021308009] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:17:16,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:17:16,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 11] total 23 [2024-11-18 09:17:16,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418434047] [2024-11-18 09:17:16,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:17:16,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-18 09:17:16,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:17:16,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-18 09:17:16,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2024-11-18 09:17:16,956 INFO L87 Difference]: Start difference. First operand 106 states and 133 transitions. Second operand has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 17 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-18 09:17:17,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:17:17,253 INFO L93 Difference]: Finished difference Result 150 states and 187 transitions. [2024-11-18 09:17:17,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-18 09:17:17,254 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 17 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2024-11-18 09:17:17,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:17:17,255 INFO L225 Difference]: With dead ends: 150 [2024-11-18 09:17:17,255 INFO L226 Difference]: Without dead ends: 146 [2024-11-18 09:17:17,256 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2024-11-18 09:17:17,256 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 09:17:17,257 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 177 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 09:17:17,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-11-18 09:17:17,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 112. [2024-11-18 09:17:17,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 98 states have (on average 1.2448979591836735) internal successors, (122), 99 states have internal predecessors, (122), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-18 09:17:17,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2024-11-18 09:17:17,276 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 47 [2024-11-18 09:17:17,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:17:17,276 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2024-11-18 09:17:17,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 17 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-18 09:17:17,276 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2024-11-18 09:17:17,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-18 09:17:17,277 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:17:17,277 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:17:17,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-18 09:17:17,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:17:17,478 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:17:17,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:17:17,479 INFO L85 PathProgramCache]: Analyzing trace with hash 694362258, now seen corresponding path program 3 times [2024-11-18 09:17:17,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:17:17,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277136033] [2024-11-18 09:17:17,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 09:17:17,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:17:17,495 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-18 09:17:17,495 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:17:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-18 09:17:17,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:17:17,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277136033] [2024-11-18 09:17:17,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277136033] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 09:17:17,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 09:17:17,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-18 09:17:17,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517292345] [2024-11-18 09:17:17,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 09:17:17,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-18 09:17:17,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:17:17,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-18 09:17:17,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-18 09:17:17,554 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-18 09:17:17,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:17:17,646 INFO L93 Difference]: Finished difference Result 167 states and 201 transitions. [2024-11-18 09:17:17,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 09:17:17,646 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2024-11-18 09:17:17,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:17:17,648 INFO L225 Difference]: With dead ends: 167 [2024-11-18 09:17:17,648 INFO L226 Difference]: Without dead ends: 127 [2024-11-18 09:17:17,648 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-18 09:17:17,649 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 21 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 09:17:17,649 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 80 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 09:17:17,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-18 09:17:17,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 111. [2024-11-18 09:17:17,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 97 states have (on average 1.2268041237113403) internal successors, (119), 98 states have internal predecessors, (119), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-18 09:17:17,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 135 transitions. [2024-11-18 09:17:17,668 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 135 transitions. Word has length 48 [2024-11-18 09:17:17,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:17:17,668 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 135 transitions. [2024-11-18 09:17:17,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-18 09:17:17,668 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 135 transitions. [2024-11-18 09:17:17,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-18 09:17:17,669 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:17:17,669 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:17:17,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-18 09:17:17,669 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:17:17,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:17:17,670 INFO L85 PathProgramCache]: Analyzing trace with hash -166116396, now seen corresponding path program 4 times [2024-11-18 09:17:17,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:17:17,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476441736] [2024-11-18 09:17:17,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 09:17:17,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:17:17,681 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 09:17:17,681 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:17:17,737 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-18 09:17:17,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:17:17,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476441736] [2024-11-18 09:17:17,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476441736] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:17:17,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871709506] [2024-11-18 09:17:17,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 09:17:17,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:17:17,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:17:17,740 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) [2024-11-18 09:17:17,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-18 09:17:17,800 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 09:17:17,800 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:17:17,801 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-18 09:17:17,802 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:17:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-18 09:17:17,846 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:17:17,894 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-18 09:17:17,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871709506] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:17:17,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:17:17,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-18 09:17:17,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564586418] [2024-11-18 09:17:17,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:17:17,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-18 09:17:17,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:17:17,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-18 09:17:17,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-18 09:17:17,897 INFO L87 Difference]: Start difference. First operand 111 states and 135 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 09:17:18,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:17:18,012 INFO L93 Difference]: Finished difference Result 118 states and 141 transitions. [2024-11-18 09:17:18,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-18 09:17:18,012 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2024-11-18 09:17:18,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:17:18,013 INFO L225 Difference]: With dead ends: 118 [2024-11-18 09:17:18,013 INFO L226 Difference]: Without dead ends: 71 [2024-11-18 09:17:18,014 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-11-18 09:17:18,015 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 34 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 09:17:18,015 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 97 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 09:17:18,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-18 09:17:18,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 53. [2024-11-18 09:17:18,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 09:17:18,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2024-11-18 09:17:18,023 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 50 [2024-11-18 09:17:18,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:17:18,024 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2024-11-18 09:17:18,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 09:17:18,024 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2024-11-18 09:17:18,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-18 09:17:18,025 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:17:18,025 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:17:18,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-18 09:17:18,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-18 09:17:18,226 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:17:18,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:17:18,226 INFO L85 PathProgramCache]: Analyzing trace with hash -4709032, now seen corresponding path program 4 times [2024-11-18 09:17:18,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:17:18,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860811715] [2024-11-18 09:17:18,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 09:17:18,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:17:18,254 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 09:17:18,255 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-18 09:17:18,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286634221] [2024-11-18 09:17:18,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 09:17:18,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:17:18,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:17:18,258 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) [2024-11-18 09:17:18,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-18 09:17:18,481 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 09:17:18,481 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:17:18,483 WARN L253 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 102 conjuncts are in the unsatisfiable core [2024-11-18 09:17:18,487 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:17:18,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 09:17:18,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-18 09:17:18,879 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:17:18,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-11-18 09:17:18,995 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:17:18,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2024-11-18 09:17:19,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:19,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:19,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:19,680 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-18 09:17:19,698 INFO L349 Elim1Store]: treesize reduction 45, result has 19.6 percent of original size [2024-11-18 09:17:19,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 74 treesize of output 98 [2024-11-18 09:17:20,410 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 09:17:20,410 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:17:23,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:17:23,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860811715] [2024-11-18 09:17:23,506 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 09:17:23,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286634221] [2024-11-18 09:17:23,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286634221] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:17:23,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-18 09:17:23,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2024-11-18 09:17:23,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249179941] [2024-11-18 09:17:23,507 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-18 09:17:23,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-18 09:17:23,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:17:23,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-18 09:17:23,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=2448, Unknown=0, NotChecked=0, Total=2862 [2024-11-18 09:17:23,508 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 39 states, 38 states have (on average 1.236842105263158) internal successors, (47), 35 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 09:17:24,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:17:24,386 INFO L93 Difference]: Finished difference Result 118 states and 142 transitions. [2024-11-18 09:17:24,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-18 09:17:24,387 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.236842105263158) internal successors, (47), 35 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 56 [2024-11-18 09:17:24,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:17:24,388 INFO L225 Difference]: With dead ends: 118 [2024-11-18 09:17:24,388 INFO L226 Difference]: Without dead ends: 114 [2024-11-18 09:17:24,389 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1339 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=447, Invalid=2859, Unknown=0, NotChecked=0, Total=3306 [2024-11-18 09:17:24,389 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 69 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 09:17:24,389 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 154 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 09:17:24,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-18 09:17:24,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 88. [2024-11-18 09:17:24,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 79 states have internal predecessors, (94), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-18 09:17:24,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2024-11-18 09:17:24,407 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 56 [2024-11-18 09:17:24,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:17:24,407 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2024-11-18 09:17:24,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.236842105263158) internal successors, (47), 35 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 09:17:24,407 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2024-11-18 09:17:24,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-18 09:17:24,408 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:17:24,408 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:17:24,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-18 09:17:24,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:17:24,609 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:17:24,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:17:24,609 INFO L85 PathProgramCache]: Analyzing trace with hash 214145686, now seen corresponding path program 5 times [2024-11-18 09:17:24,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:17:24,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631850914] [2024-11-18 09:17:24,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 09:17:24,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:17:24,658 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-11-18 09:17:24,658 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-18 09:17:24,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2025568533] [2024-11-18 09:17:24,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 09:17:24,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:17:24,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:17:24,666 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) [2024-11-18 09:17:24,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-18 09:17:24,870 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-11-18 09:17:24,870 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:17:24,872 WARN L253 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-11-18 09:17:24,876 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:17:24,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 09:17:25,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-18 09:17:25,177 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:17:25,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-11-18 09:17:25,248 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:17:25,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2024-11-18 09:17:25,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:25,890 INFO L349 Elim1Store]: treesize reduction 284, result has 13.1 percent of original size [2024-11-18 09:17:25,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 7 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 42 case distinctions, treesize of input 84 treesize of output 94 [2024-11-18 09:17:26,377 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 09:17:26,377 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:17:29,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:17:29,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631850914] [2024-11-18 09:17:29,229 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 09:17:29,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025568533] [2024-11-18 09:17:29,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025568533] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:17:29,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-18 09:17:29,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2024-11-18 09:17:29,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709568662] [2024-11-18 09:17:29,229 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-18 09:17:29,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-18 09:17:29,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:17:29,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-18 09:17:29,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1855, Unknown=0, NotChecked=0, Total=2162 [2024-11-18 09:17:29,231 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand has 32 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 28 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 09:17:30,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:17:30,217 INFO L93 Difference]: Finished difference Result 161 states and 191 transitions. [2024-11-18 09:17:30,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-18 09:17:30,217 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 28 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 56 [2024-11-18 09:17:30,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:17:30,218 INFO L225 Difference]: With dead ends: 161 [2024-11-18 09:17:30,219 INFO L226 Difference]: Without dead ends: 144 [2024-11-18 09:17:30,219 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=350, Invalid=2200, Unknown=0, NotChecked=0, Total=2550 [2024-11-18 09:17:30,220 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 81 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-18 09:17:30,220 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 241 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-18 09:17:30,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-11-18 09:17:30,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 105. [2024-11-18 09:17:30,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 93 states have (on average 1.1827956989247312) internal successors, (110), 93 states have internal predecessors, (110), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-18 09:17:30,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 124 transitions. [2024-11-18 09:17:30,238 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 124 transitions. Word has length 56 [2024-11-18 09:17:30,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:17:30,239 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 124 transitions. [2024-11-18 09:17:30,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 28 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 09:17:30,239 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 124 transitions. [2024-11-18 09:17:30,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-18 09:17:30,239 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:17:30,240 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:17:30,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-18 09:17:30,441 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,SelfDestructingSolverStorable12 [2024-11-18 09:17:30,441 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:17:30,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:17:30,441 INFO L85 PathProgramCache]: Analyzing trace with hash -70154694, now seen corresponding path program 5 times [2024-11-18 09:17:30,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:17:30,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038852621] [2024-11-18 09:17:30,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 09:17:30,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:17:30,453 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-18 09:17:30,453 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:17:30,520 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-18 09:17:30,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:17:30,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038852621] [2024-11-18 09:17:30,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038852621] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:17:30,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627009459] [2024-11-18 09:17:30,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 09:17:30,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:17:30,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:17:30,523 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) [2024-11-18 09:17:30,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-18 09:17:30,595 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-18 09:17:30,595 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:17:30,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-18 09:17:30,597 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:17:30,663 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-18 09:17:30,663 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:17:30,724 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 19 proven. 30 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-18 09:17:30,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627009459] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:17:30,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:17:30,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2024-11-18 09:17:30,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113340442] [2024-11-18 09:17:30,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:17:30,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-18 09:17:30,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:17:30,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-18 09:17:30,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-11-18 09:17:30,726 INFO L87 Difference]: Start difference. First operand 105 states and 124 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 09:17:30,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:17:30,841 INFO L93 Difference]: Finished difference Result 237 states and 283 transitions. [2024-11-18 09:17:30,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-18 09:17:30,842 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 58 [2024-11-18 09:17:30,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:17:30,843 INFO L225 Difference]: With dead ends: 237 [2024-11-18 09:17:30,843 INFO L226 Difference]: Without dead ends: 152 [2024-11-18 09:17:30,843 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 107 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-11-18 09:17:30,844 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 15 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 09:17:30,844 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 127 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 09:17:30,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-11-18 09:17:30,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 131. [2024-11-18 09:17:30,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 116 states have (on average 1.1810344827586208) internal successors, (137), 116 states have internal predecessors, (137), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-18 09:17:30,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 155 transitions. [2024-11-18 09:17:30,866 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 155 transitions. Word has length 58 [2024-11-18 09:17:30,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:17:30,866 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 155 transitions. [2024-11-18 09:17:30,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 09:17:30,867 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 155 transitions. [2024-11-18 09:17:30,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-18 09:17:30,867 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:17:30,867 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:17:30,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-18 09:17:31,068 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,SelfDestructingSolverStorable13 [2024-11-18 09:17:31,068 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:17:31,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:17:31,068 INFO L85 PathProgramCache]: Analyzing trace with hash -2106200234, now seen corresponding path program 6 times [2024-11-18 09:17:31,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:17:31,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487768900] [2024-11-18 09:17:31,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 09:17:31,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:17:31,105 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-18 09:17:31,105 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:17:31,213 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-18 09:17:31,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:17:31,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487768900] [2024-11-18 09:17:31,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487768900] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:17:31,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963865570] [2024-11-18 09:17:31,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 09:17:31,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:17:31,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:17:31,216 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) [2024-11-18 09:17:31,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-18 09:17:31,428 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-18 09:17:31,428 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:17:31,429 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-18 09:17:31,431 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:17:31,531 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-18 09:17:31,531 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:17:31,615 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-18 09:17:31,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963865570] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:17:31,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:17:31,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-18 09:17:31,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734504692] [2024-11-18 09:17:31,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:17:31,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-18 09:17:31,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:17:31,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-18 09:17:31,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-11-18 09:17:31,617 INFO L87 Difference]: Start difference. First operand 131 states and 155 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 09:17:31,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:17:31,919 INFO L93 Difference]: Finished difference Result 195 states and 227 transitions. [2024-11-18 09:17:31,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-18 09:17:31,919 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 58 [2024-11-18 09:17:31,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:17:31,920 INFO L225 Difference]: With dead ends: 195 [2024-11-18 09:17:31,920 INFO L226 Difference]: Without dead ends: 191 [2024-11-18 09:17:31,921 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 105 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=632, Unknown=0, NotChecked=0, Total=870 [2024-11-18 09:17:31,921 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 44 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 09:17:31,921 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 243 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 09:17:31,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-11-18 09:17:31,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 150. [2024-11-18 09:17:31,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 132 states have (on average 1.1893939393939394) internal successors, (157), 132 states have internal predecessors, (157), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-18 09:17:31,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 179 transitions. [2024-11-18 09:17:31,946 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 179 transitions. Word has length 58 [2024-11-18 09:17:31,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:17:31,946 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 179 transitions. [2024-11-18 09:17:31,946 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 09:17:31,946 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 179 transitions. [2024-11-18 09:17:31,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-18 09:17:31,947 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:17:31,947 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:17:31,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-18 09:17:32,151 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,SelfDestructingSolverStorable14 [2024-11-18 09:17:32,152 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:17:32,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:17:32,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1538493247, now seen corresponding path program 7 times [2024-11-18 09:17:32,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:17:32,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405782344] [2024-11-18 09:17:32,152 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 09:17:32,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:17:32,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:17:32,281 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 34 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-18 09:17:32,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:17:32,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405782344] [2024-11-18 09:17:32,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405782344] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:17:32,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372520151] [2024-11-18 09:17:32,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 09:17:32,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:17:32,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:17:32,284 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) [2024-11-18 09:17:32,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-18 09:17:32,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:17:32,364 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-18 09:17:32,366 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:17:32,468 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 58 proven. 17 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-18 09:17:32,469 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:17:32,549 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-18 09:17:32,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372520151] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:17:32,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:17:32,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-18 09:17:32,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135131127] [2024-11-18 09:17:32,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:17:32,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-18 09:17:32,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:17:32,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-18 09:17:32,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-11-18 09:17:32,551 INFO L87 Difference]: Start difference. First operand 150 states and 179 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 09:17:32,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:17:32,738 INFO L93 Difference]: Finished difference Result 194 states and 223 transitions. [2024-11-18 09:17:32,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-18 09:17:32,738 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 63 [2024-11-18 09:17:32,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:17:32,739 INFO L225 Difference]: With dead ends: 194 [2024-11-18 09:17:32,739 INFO L226 Difference]: Without dead ends: 150 [2024-11-18 09:17:32,740 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 116 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2024-11-18 09:17:32,740 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 23 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 09:17:32,740 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 99 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 09:17:32,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-18 09:17:32,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 141. [2024-11-18 09:17:32,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 126 states have (on average 1.1507936507936507) internal successors, (145), 126 states have internal predecessors, (145), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-18 09:17:32,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 163 transitions. [2024-11-18 09:17:32,769 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 163 transitions. Word has length 63 [2024-11-18 09:17:32,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:17:32,769 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 163 transitions. [2024-11-18 09:17:32,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 09:17:32,769 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 163 transitions. [2024-11-18 09:17:32,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-18 09:17:32,770 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:17:32,771 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:17:32,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-18 09:17:32,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-18 09:17:32,971 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:17:32,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:17:32,972 INFO L85 PathProgramCache]: Analyzing trace with hash 834719615, now seen corresponding path program 8 times [2024-11-18 09:17:32,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:17:32,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239609189] [2024-11-18 09:17:32,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 09:17:32,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:17:32,986 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 09:17:32,987 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:17:33,115 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-18 09:17:33,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:17:33,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239609189] [2024-11-18 09:17:33,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239609189] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:17:33,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445289834] [2024-11-18 09:17:33,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 09:17:33,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:17:33,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:17:33,118 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) [2024-11-18 09:17:33,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-18 09:17:33,202 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 09:17:33,202 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:17:33,205 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-18 09:17:33,207 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:17:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 12 proven. 34 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-11-18 09:17:33,310 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:17:33,392 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-18 09:17:33,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445289834] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:17:33,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:17:33,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-11-18 09:17:33,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798141255] [2024-11-18 09:17:33,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:17:33,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-18 09:17:33,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:17:33,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-18 09:17:33,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2024-11-18 09:17:33,395 INFO L87 Difference]: Start difference. First operand 141 states and 163 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 09:17:33,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:17:33,618 INFO L93 Difference]: Finished difference Result 233 states and 270 transitions. [2024-11-18 09:17:33,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-18 09:17:33,619 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2024-11-18 09:17:33,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:17:33,620 INFO L225 Difference]: With dead ends: 233 [2024-11-18 09:17:33,620 INFO L226 Difference]: Without dead ends: 174 [2024-11-18 09:17:33,621 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2024-11-18 09:17:33,621 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 50 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 09:17:33,621 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 183 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 09:17:33,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-11-18 09:17:33,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 150. [2024-11-18 09:17:33,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 135 states have (on average 1.1481481481481481) internal successors, (155), 135 states have internal predecessors, (155), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-18 09:17:33,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 173 transitions. [2024-11-18 09:17:33,658 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 173 transitions. Word has length 67 [2024-11-18 09:17:33,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:17:33,658 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 173 transitions. [2024-11-18 09:17:33,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 09:17:33,658 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 173 transitions. [2024-11-18 09:17:33,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-18 09:17:33,659 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:17:33,659 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 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] [2024-11-18 09:17:33,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-18 09:17:33,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:17:33,859 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:17:33,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:17:33,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1335153970, now seen corresponding path program 1 times [2024-11-18 09:17:33,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:17:33,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85606386] [2024-11-18 09:17:33,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:17:33,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:17:33,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-18 09:17:33,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1973049634] [2024-11-18 09:17:33,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:17:33,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:17:33,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:17:33,882 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) [2024-11-18 09:17:33,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-18 09:17:34,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:17:34,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-18 09:17:34,276 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:17:34,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 09:17:34,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-18 09:17:34,533 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:17:34,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-11-18 09:17:34,609 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:17:34,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2024-11-18 09:17:35,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:35,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:35,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:35,236 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-18 09:17:35,251 INFO L349 Elim1Store]: treesize reduction 45, result has 19.6 percent of original size [2024-11-18 09:17:35,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 74 treesize of output 98 [2024-11-18 09:17:35,871 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-18 09:17:35,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:35,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:35,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:35,884 INFO L349 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2024-11-18 09:17:35,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 74 treesize of output 94 [2024-11-18 09:17:36,657 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 72 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-18 09:17:36,657 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:17:39,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:17:39,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85606386] [2024-11-18 09:17:39,510 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 09:17:39,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973049634] [2024-11-18 09:17:39,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973049634] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:17:39,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-18 09:17:39,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2024-11-18 09:17:39,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067854955] [2024-11-18 09:17:39,511 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-18 09:17:39,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-18 09:17:39,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:17:39,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-18 09:17:39,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=2757, Unknown=0, NotChecked=0, Total=3080 [2024-11-18 09:17:39,512 INFO L87 Difference]: Start difference. First operand 150 states and 173 transitions. Second operand has 41 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 34 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-18 09:17:41,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:17:41,090 INFO L93 Difference]: Finished difference Result 189 states and 214 transitions. [2024-11-18 09:17:41,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-18 09:17:41,091 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 34 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 70 [2024-11-18 09:17:41,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:17:41,093 INFO L225 Difference]: With dead ends: 189 [2024-11-18 09:17:41,093 INFO L226 Difference]: Without dead ends: 169 [2024-11-18 09:17:41,094 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=537, Invalid=4155, Unknown=0, NotChecked=0, Total=4692 [2024-11-18 09:17:41,094 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 80 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 1147 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-18 09:17:41,095 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 278 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1147 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-18 09:17:41,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-11-18 09:17:41,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 158. [2024-11-18 09:17:41,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 140 states have (on average 1.15) internal successors, (161), 140 states have internal predecessors, (161), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-18 09:17:41,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 183 transitions. [2024-11-18 09:17:41,122 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 183 transitions. Word has length 70 [2024-11-18 09:17:41,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:17:41,123 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 183 transitions. [2024-11-18 09:17:41,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 34 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-18 09:17:41,123 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 183 transitions. [2024-11-18 09:17:41,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-18 09:17:41,123 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:17:41,123 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:17:41,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-18 09:17:41,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-18 09:17:41,324 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:17:41,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:17:41,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1554008688, now seen corresponding path program 1 times [2024-11-18 09:17:41,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:17:41,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28604382] [2024-11-18 09:17:41,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:17:41,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:17:41,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-18 09:17:41,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [213028350] [2024-11-18 09:17:41,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:17:41,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:17:41,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:17:41,365 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) [2024-11-18 09:17:41,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-18 09:17:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:17:41,693 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-11-18 09:17:41,697 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:17:41,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 09:17:41,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-18 09:17:41,999 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:17:41,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2024-11-18 09:17:42,047 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:17:42,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-11-18 09:17:42,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:42,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:42,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:42,504 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-18 09:17:42,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 74 [2024-11-18 09:17:43,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:43,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:43,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:43,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:43,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:43,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:43,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:43,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:43,576 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-18 09:17:43,692 INFO L349 Elim1Store]: treesize reduction 476, result has 11.9 percent of original size [2024-11-18 09:17:43,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 7 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 75 case distinctions, treesize of input 117 treesize of output 136 [2024-11-18 09:17:44,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:44,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:44,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:44,594 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-18 09:17:44,599 INFO L349 Elim1Store]: treesize reduction 25, result has 10.7 percent of original size [2024-11-18 09:17:44,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 63 treesize of output 28 [2024-11-18 09:17:44,648 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 32 proven. 55 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-18 09:17:44,648 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:17:47,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:17:47,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28604382] [2024-11-18 09:17:47,720 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 09:17:47,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213028350] [2024-11-18 09:17:47,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213028350] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:17:47,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-18 09:17:47,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2024-11-18 09:17:47,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110439766] [2024-11-18 09:17:47,720 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-18 09:17:47,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-18 09:17:47,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:17:47,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-18 09:17:47,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=2612, Unknown=0, NotChecked=0, Total=2970 [2024-11-18 09:17:47,722 INFO L87 Difference]: Start difference. First operand 158 states and 183 transitions. Second operand has 40 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 33 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-18 09:17:49,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:17:49,788 INFO L93 Difference]: Finished difference Result 198 states and 225 transitions. [2024-11-18 09:17:49,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-18 09:17:49,789 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 33 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 70 [2024-11-18 09:17:49,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:17:49,790 INFO L225 Difference]: With dead ends: 198 [2024-11-18 09:17:49,790 INFO L226 Difference]: Without dead ends: 156 [2024-11-18 09:17:49,791 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=709, Invalid=4693, Unknown=0, NotChecked=0, Total=5402 [2024-11-18 09:17:49,791 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 108 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-18 09:17:49,791 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 297 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-18 09:17:49,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-11-18 09:17:49,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 148. [2024-11-18 09:17:49,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 133 states have (on average 1.1428571428571428) internal successors, (152), 133 states have internal predecessors, (152), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-18 09:17:49,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 170 transitions. [2024-11-18 09:17:49,815 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 170 transitions. Word has length 70 [2024-11-18 09:17:49,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:17:49,816 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 170 transitions. [2024-11-18 09:17:49,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 33 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-18 09:17:49,816 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 170 transitions. [2024-11-18 09:17:49,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-18 09:17:49,817 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:17:49,817 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:17:49,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-18 09:17:50,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:17:50,018 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:17:50,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:17:50,018 INFO L85 PathProgramCache]: Analyzing trace with hash 940787184, now seen corresponding path program 2 times [2024-11-18 09:17:50,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:17:50,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536722852] [2024-11-18 09:17:50,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 09:17:50,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:17:50,040 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 09:17:50,040 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-18 09:17:50,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [183967497] [2024-11-18 09:17:50,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 09:17:50,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:17:50,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:17:50,043 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) [2024-11-18 09:17:50,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-18 09:17:50,452 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 09:17:50,452 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:17:50,454 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-11-18 09:17:50,458 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:17:50,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 09:17:50,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-18 09:17:50,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:50,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:50,650 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:17:50,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2024-11-18 09:17:50,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:50,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:50,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:50,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:50,729 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:17:50,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2024-11-18 09:17:51,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:51,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:51,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:51,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:51,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:51,296 INFO L349 Elim1Store]: treesize reduction 304, result has 14.4 percent of original size [2024-11-18 09:17:51,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 7 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 42 case distinctions, treesize of input 100 treesize of output 108 [2024-11-18 09:17:51,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:51,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:51,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:51,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:51,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:51,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:51,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:51,712 INFO L349 Elim1Store]: treesize reduction 80, result has 27.9 percent of original size [2024-11-18 09:17:51,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 30 case distinctions, treesize of input 88 treesize of output 120 [2024-11-18 09:17:53,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:53,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:53,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:53,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:17:53,101 INFO L349 Elim1Store]: treesize reduction 28, result has 65.9 percent of original size [2024-11-18 09:17:53,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 115 treesize of output 110 [2024-11-18 09:17:54,145 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 52 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-18 09:17:54,145 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:17:56,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:17:56,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536722852] [2024-11-18 09:17:56,755 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 09:17:56,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183967497] [2024-11-18 09:17:56,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183967497] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:17:56,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-18 09:17:56,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2024-11-18 09:17:56,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879111731] [2024-11-18 09:17:56,755 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-18 09:17:56,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-18 09:17:56,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:17:56,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-18 09:17:56,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1883, Unknown=0, NotChecked=0, Total=2162 [2024-11-18 09:17:56,756 INFO L87 Difference]: Start difference. First operand 148 states and 170 transitions. Second operand has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 28 states have internal predecessors, (50), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 09:17:59,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:17:59,824 INFO L93 Difference]: Finished difference Result 324 states and 379 transitions. [2024-11-18 09:17:59,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-18 09:17:59,825 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 28 states have internal predecessors, (50), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 70 [2024-11-18 09:17:59,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:17:59,827 INFO L225 Difference]: With dead ends: 324 [2024-11-18 09:17:59,827 INFO L226 Difference]: Without dead ends: 288 [2024-11-18 09:17:59,828 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1475 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=641, Invalid=4329, Unknown=0, NotChecked=0, Total=4970 [2024-11-18 09:17:59,828 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 81 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 1722 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 1765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-18 09:17:59,829 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 411 Invalid, 1765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1722 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-18 09:17:59,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2024-11-18 09:17:59,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 150. [2024-11-18 09:17:59,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 135 states have (on average 1.1407407407407408) internal successors, (154), 135 states have internal predecessors, (154), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-18 09:17:59,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 172 transitions. [2024-11-18 09:17:59,863 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 172 transitions. Word has length 70 [2024-11-18 09:17:59,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:17:59,863 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 172 transitions. [2024-11-18 09:17:59,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 28 states have internal predecessors, (50), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 09:17:59,863 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 172 transitions. [2024-11-18 09:17:59,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-18 09:17:59,864 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:17:59,864 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:17:59,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-18 09:18:00,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:18:00,065 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:18:00,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:18:00,065 INFO L85 PathProgramCache]: Analyzing trace with hash -988568201, now seen corresponding path program 9 times [2024-11-18 09:18:00,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:18:00,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596562308] [2024-11-18 09:18:00,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 09:18:00,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:18:00,087 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-18 09:18:00,087 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:18:00,166 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 6 proven. 46 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2024-11-18 09:18:00,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:18:00,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596562308] [2024-11-18 09:18:00,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596562308] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:18:00,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452846630] [2024-11-18 09:18:00,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 09:18:00,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:18:00,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:18:00,168 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) [2024-11-18 09:18:00,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-18 09:18:00,394 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-18 09:18:00,395 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:18:00,396 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-18 09:18:00,397 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:18:00,443 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 22 proven. 30 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2024-11-18 09:18:00,443 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:18:00,488 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 22 proven. 30 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2024-11-18 09:18:00,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452846630] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:18:00,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:18:00,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-11-18 09:18:00,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455710140] [2024-11-18 09:18:00,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:18:00,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-18 09:18:00,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:18:00,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-18 09:18:00,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2024-11-18 09:18:00,490 INFO L87 Difference]: Start difference. First operand 150 states and 172 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-18 09:18:00,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:18:00,660 INFO L93 Difference]: Finished difference Result 219 states and 247 transitions. [2024-11-18 09:18:00,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-18 09:18:00,661 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 76 [2024-11-18 09:18:00,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:18:00,661 INFO L225 Difference]: With dead ends: 219 [2024-11-18 09:18:00,662 INFO L226 Difference]: Without dead ends: 136 [2024-11-18 09:18:00,662 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 149 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2024-11-18 09:18:00,662 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 54 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 09:18:00,663 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 96 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 09:18:00,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-18 09:18:00,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2024-11-18 09:18:00,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 119 states have (on average 1.1176470588235294) internal successors, (133), 119 states have internal predecessors, (133), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-18 09:18:00,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 151 transitions. [2024-11-18 09:18:00,693 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 151 transitions. Word has length 76 [2024-11-18 09:18:00,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:18:00,694 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 151 transitions. [2024-11-18 09:18:00,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-18 09:18:00,694 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 151 transitions. [2024-11-18 09:18:00,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-18 09:18:00,695 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:18:00,695 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:18:00,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-18 09:18:00,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:18:00,895 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:18:00,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:18:00,896 INFO L85 PathProgramCache]: Analyzing trace with hash 339676106, now seen corresponding path program 3 times [2024-11-18 09:18:00,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:18:00,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688298914] [2024-11-18 09:18:00,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 09:18:00,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:18:00,950 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-18 09:18:00,954 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-18 09:18:00,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175120079] [2024-11-18 09:18:00,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 09:18:00,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:18:00,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:18:00,960 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 09:18:00,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-18 09:18:02,018 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-18 09:18:02,018 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:18:02,021 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 117 conjuncts are in the unsatisfiable core [2024-11-18 09:18:02,024 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:18:02,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 09:18:02,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-18 09:18:02,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:18:02,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:18:02,226 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:18:02,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2024-11-18 09:18:02,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:18:02,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:18:02,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:18:02,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:18:02,321 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:18:02,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2024-11-18 09:18:02,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:18:02,989 INFO L349 Elim1Store]: treesize reduction 284, result has 13.1 percent of original size [2024-11-18 09:18:02,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 7 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 42 case distinctions, treesize of input 84 treesize of output 94 [2024-11-18 09:18:03,443 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-18 09:18:03,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:18:03,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:18:03,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:18:03,462 INFO L349 Elim1Store]: treesize reduction 45, result has 19.6 percent of original size [2024-11-18 09:18:03,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 74 treesize of output 98 [2024-11-18 09:18:04,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:18:04,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:18:04,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:18:04,038 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-18 09:18:04,051 INFO L349 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2024-11-18 09:18:04,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 74 treesize of output 94 [2024-11-18 09:18:04,999 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 24 proven. 96 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-18 09:18:04,999 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:18:05,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:18:05,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688298914] [2024-11-18 09:18:05,910 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 09:18:05,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175120079] [2024-11-18 09:18:05,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175120079] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:18:05,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-18 09:18:05,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2024-11-18 09:18:05,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825985837] [2024-11-18 09:18:05,910 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-18 09:18:05,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-18 09:18:05,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:18:05,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-18 09:18:05,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=637, Invalid=3145, Unknown=0, NotChecked=0, Total=3782 [2024-11-18 09:18:05,913 INFO L87 Difference]: Start difference. First operand 134 states and 151 transitions. Second operand has 44 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 38 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-18 09:18:07,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:18:07,106 INFO L93 Difference]: Finished difference Result 166 states and 185 transitions. [2024-11-18 09:18:07,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-18 09:18:07,107 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 38 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 84 [2024-11-18 09:18:07,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:18:07,108 INFO L225 Difference]: With dead ends: 166 [2024-11-18 09:18:07,108 INFO L226 Difference]: Without dead ends: 146 [2024-11-18 09:18:07,109 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2350 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1007, Invalid=4999, Unknown=0, NotChecked=0, Total=6006 [2024-11-18 09:18:07,110 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 71 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-18 09:18:07,110 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 263 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1014 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-18 09:18:07,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-11-18 09:18:07,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 142. [2024-11-18 09:18:07,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 124 states have (on average 1.1209677419354838) internal successors, (139), 124 states have internal predecessors, (139), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-18 09:18:07,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 161 transitions. [2024-11-18 09:18:07,149 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 161 transitions. Word has length 84 [2024-11-18 09:18:07,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:18:07,149 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 161 transitions. [2024-11-18 09:18:07,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 38 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-18 09:18:07,149 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 161 transitions. [2024-11-18 09:18:07,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-18 09:18:07,150 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:18:07,150 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:18:07,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-18 09:18:07,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:18:07,350 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:18:07,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:18:07,351 INFO L85 PathProgramCache]: Analyzing trace with hash 558530824, now seen corresponding path program 4 times [2024-11-18 09:18:07,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:18:07,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075815745] [2024-11-18 09:18:07,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 09:18:07,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:18:07,376 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 09:18:07,376 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-18 09:18:07,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [499473599] [2024-11-18 09:18:07,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 09:18:07,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:18:07,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:18:07,379 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 09:18:07,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-18 09:18:08,199 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 09:18:08,199 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:18:08,201 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 112 conjuncts are in the unsatisfiable core [2024-11-18 09:18:08,205 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:18:08,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 09:18:08,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-18 09:18:08,499 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:18:08,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-11-18 09:18:08,586 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:18:08,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2024-11-18 09:18:09,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:18:09,355 INFO L349 Elim1Store]: treesize reduction 284, result has 13.1 percent of original size [2024-11-18 09:18:09,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 7 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 42 case distinctions, treesize of input 84 treesize of output 94 [2024-11-18 09:18:09,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:18:09,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:18:09,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:18:09,739 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-18 09:18:09,750 INFO L349 Elim1Store]: treesize reduction 45, result has 19.6 percent of original size [2024-11-18 09:18:09,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 74 treesize of output 98 [2024-11-18 09:18:10,245 INFO L349 Elim1Store]: treesize reduction 144, result has 16.8 percent of original size [2024-11-18 09:18:10,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 56 treesize of output 54 [2024-11-18 09:18:10,705 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 19 proven. 101 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-18 09:18:10,705 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:18:14,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:18:14,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075815745] [2024-11-18 09:18:14,194 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 09:18:14,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499473599] [2024-11-18 09:18:14,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499473599] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:18:14,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-18 09:18:14,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2024-11-18 09:18:14,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556903651] [2024-11-18 09:18:14,194 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-18 09:18:14,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-18 09:18:14,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:18:14,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-18 09:18:14,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=2620, Unknown=0, NotChecked=0, Total=2970 [2024-11-18 09:18:14,196 INFO L87 Difference]: Start difference. First operand 142 states and 161 transitions. Second operand has 40 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 36 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-18 09:18:15,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:18:15,377 INFO L93 Difference]: Finished difference Result 185 states and 208 transitions. [2024-11-18 09:18:15,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-18 09:18:15,378 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 36 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 84 [2024-11-18 09:18:15,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:18:15,379 INFO L225 Difference]: With dead ends: 185 [2024-11-18 09:18:15,379 INFO L226 Difference]: Without dead ends: 165 [2024-11-18 09:18:15,380 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 60 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=462, Invalid=3698, Unknown=0, NotChecked=0, Total=4160 [2024-11-18 09:18:15,380 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 76 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-18 09:18:15,381 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 292 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-18 09:18:15,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-11-18 09:18:15,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2024-11-18 09:18:15,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 138 states have (on average 1.1231884057971016) internal successors, (155), 138 states have internal predecessors, (155), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-18 09:18:15,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 185 transitions. [2024-11-18 09:18:15,433 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 185 transitions. Word has length 84 [2024-11-18 09:18:15,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:18:15,433 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 185 transitions. [2024-11-18 09:18:15,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 36 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-18 09:18:15,434 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 185 transitions. [2024-11-18 09:18:15,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-18 09:18:15,434 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:18:15,434 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:18:15,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-18 09:18:15,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-18 09:18:15,635 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:18:15,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:18:15,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1235145369, now seen corresponding path program 10 times [2024-11-18 09:18:15,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:18:15,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375613448] [2024-11-18 09:18:15,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 09:18:15,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:18:15,673 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 09:18:15,677 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-18 09:18:15,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222082020] [2024-11-18 09:18:15,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 09:18:15,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:18:15,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:18:15,681 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 09:18:15,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-18 09:18:17,141 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 09:18:17,142 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:18:17,145 WARN L253 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 135 conjuncts are in the unsatisfiable core [2024-11-18 09:18:17,150 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:18:17,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-18 09:18:17,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-18 09:18:17,386 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:18:17,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-11-18 09:18:17,611 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:18:17,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2024-11-18 09:18:17,706 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:18:17,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2024-11-18 09:18:17,810 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:18:17,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2024-11-18 09:18:18,012 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:18:18,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2024-11-18 09:18:18,161 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:18:18,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2024-11-18 09:18:18,331 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:18:18,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 68 treesize of output 88 [2024-11-18 09:18:19,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:18:19,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:18:19,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:18:19,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:18:19,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:18:19,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:18:19,272 INFO L349 Elim1Store]: treesize reduction 204, result has 27.9 percent of original size [2024-11-18 09:18:19,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 18 select indices, 18 select index equivalence classes, 42 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 159 case distinctions, treesize of input 144 treesize of output 230 [2024-11-18 09:18:23,197 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:18:23,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 36 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 161 treesize of output 183 [2024-11-18 09:18:23,484 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 8 proven. 225 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-18 09:18:23,484 INFO L311 TraceCheckSpWp]: Computing backward predicates...