./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/mbpr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/mbpr2.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 a98ea70d5d9f752732070144a56514c68e9571f139726211e2f0ade721d6c5f3 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 14:41:31,089 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 14:41:31,166 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 14:41:31,180 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 14:41:31,180 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 14:41:31,208 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 14:41:31,210 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 14:41:31,210 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 14:41:31,211 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 14:41:31,212 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 14:41:31,213 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 14:41:31,213 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 14:41:31,214 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 14:41:31,214 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 14:41:31,214 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 14:41:31,217 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 14:41:31,218 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 14:41:31,218 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 14:41:31,218 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 14:41:31,218 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 14:41:31,219 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 14:41:31,219 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 14:41:31,219 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 14:41:31,220 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 14:41:31,220 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 14:41:31,220 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 14:41:31,221 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 14:41:31,221 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 14:41:31,221 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 14:41:31,222 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 14:41:31,222 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 14:41:31,222 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 14:41:31,223 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 14:41:31,223 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 14:41:31,224 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 14:41:31,224 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 14:41:31,224 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 14:41:31,224 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 14:41:31,225 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 14:41:31,225 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 14:41:31,225 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 14:41:31,225 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 14:41:31,226 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a98ea70d5d9f752732070144a56514c68e9571f139726211e2f0ade721d6c5f3 [2024-10-12 14:41:31,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 14:41:31,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 14:41:31,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 14:41:31,515 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 14:41:31,515 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 14:41:31,517 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/mbpr2.c [2024-10-12 14:41:32,972 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 14:41:33,139 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 14:41:33,140 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/mbpr2.c [2024-10-12 14:41:33,151 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f603e08f0/2fed203049e64285877d04e618f99096/FLAGaca8572dc [2024-10-12 14:41:33,164 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f603e08f0/2fed203049e64285877d04e618f99096 [2024-10-12 14:41:33,167 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 14:41:33,168 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 14:41:33,172 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 14:41:33,172 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 14:41:33,177 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 14:41:33,179 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 02:41:33" (1/1) ... [2024-10-12 14:41:33,182 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@429f3697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:41:33, skipping insertion in model container [2024-10-12 14:41:33,182 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 02:41:33" (1/1) ... [2024-10-12 14:41:33,205 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 14:41:33,381 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/mbpr2.c[396,409] [2024-10-12 14:41:33,410 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 14:41:33,421 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 14:41:33,434 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/mbpr2.c[396,409] [2024-10-12 14:41:33,448 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 14:41:33,464 INFO L204 MainTranslator]: Completed translation [2024-10-12 14:41:33,465 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:41:33 WrapperNode [2024-10-12 14:41:33,465 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 14:41:33,466 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 14:41:33,467 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 14:41:33,467 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 14:41:33,473 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:41:33" (1/1) ... [2024-10-12 14:41:33,481 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:41:33" (1/1) ... [2024-10-12 14:41:33,512 INFO L138 Inliner]: procedures = 15, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 92 [2024-10-12 14:41:33,512 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 14:41:33,513 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 14:41:33,513 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 14:41:33,513 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 14:41:33,523 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:41:33" (1/1) ... [2024-10-12 14:41:33,524 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:41:33" (1/1) ... [2024-10-12 14:41:33,528 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:41:33" (1/1) ... [2024-10-12 14:41:33,545 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 8, 10]. 50 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 6 writes are split as follows [0, 0, 6]. [2024-10-12 14:41:33,546 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:41:33" (1/1) ... [2024-10-12 14:41:33,546 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:41:33" (1/1) ... [2024-10-12 14:41:33,551 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:41:33" (1/1) ... [2024-10-12 14:41:33,554 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:41:33" (1/1) ... [2024-10-12 14:41:33,555 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:41:33" (1/1) ... [2024-10-12 14:41:33,556 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:41:33" (1/1) ... [2024-10-12 14:41:33,558 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 14:41:33,559 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 14:41:33,559 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 14:41:33,559 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 14:41:33,560 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:41:33" (1/1) ... [2024-10-12 14:41:33,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 14:41:33,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:41:33,593 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-12 14:41:33,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-12 14:41:33,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 14:41:33,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 14:41:33,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-12 14:41:33,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-12 14:41:33,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-12 14:41:33,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-12 14:41:33,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-12 14:41:33,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-12 14:41:33,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 14:41:33,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 14:41:33,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-12 14:41:33,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-12 14:41:33,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-12 14:41:33,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-12 14:41:33,723 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 14:41:33,725 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 14:41:33,891 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-10-12 14:41:33,891 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 14:41:33,936 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 14:41:33,937 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-12 14:41:33,937 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 02:41:33 BoogieIcfgContainer [2024-10-12 14:41:33,937 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 14:41:33,943 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 14:41:33,943 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 14:41:33,946 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 14:41:33,947 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 02:41:33" (1/3) ... [2024-10-12 14:41:33,948 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1249b6af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 02:41:33, skipping insertion in model container [2024-10-12 14:41:33,949 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:41:33" (2/3) ... [2024-10-12 14:41:33,949 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1249b6af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 02:41:33, skipping insertion in model container [2024-10-12 14:41:33,950 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 02:41:33" (3/3) ... [2024-10-12 14:41:33,951 INFO L112 eAbstractionObserver]: Analyzing ICFG mbpr2.c [2024-10-12 14:41:33,968 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 14:41:33,968 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 14:41:34,025 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 14:41:34,030 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;@7644c235, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 14:41:34,031 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 14:41:34,034 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:41:34,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-12 14:41:34,040 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:41:34,040 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:41:34,041 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:41:34,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:41:34,047 INFO L85 PathProgramCache]: Analyzing trace with hash -951462663, now seen corresponding path program 1 times [2024-10-12 14:41:34,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:41:34,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538717174] [2024-10-12 14:41:34,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:41:34,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:41:34,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:41:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:41:34,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:41:34,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538717174] [2024-10-12 14:41:34,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538717174] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:41:34,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:41:34,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 14:41:34,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83659039] [2024-10-12 14:41:34,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:41:34,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-12 14:41:34,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:41:34,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-12 14:41:34,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 14:41:34,363 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:41:34,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:41:34,401 INFO L93 Difference]: Finished difference Result 44 states and 65 transitions. [2024-10-12 14:41:34,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-12 14:41:34,404 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-10-12 14:41:34,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:41:34,411 INFO L225 Difference]: With dead ends: 44 [2024-10-12 14:41:34,411 INFO L226 Difference]: Without dead ends: 20 [2024-10-12 14:41:34,414 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 [2024-10-12 14:41:34,420 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:41:34,421 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:41:34,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-10-12 14:41:34,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-10-12 14:41:34,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:41:34,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2024-10-12 14:41:34,455 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 14 [2024-10-12 14:41:34,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:41:34,455 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2024-10-12 14:41:34,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:41:34,456 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2024-10-12 14:41:34,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-12 14:41:34,456 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:41:34,456 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:41:34,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 14:41:34,457 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:41:34,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:41:34,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1175939807, now seen corresponding path program 1 times [2024-10-12 14:41:34,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:41:34,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919703373] [2024-10-12 14:41:34,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:41:34,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:41:34,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:41:34,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:41:34,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:41:34,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919703373] [2024-10-12 14:41:34,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919703373] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:41:34,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:41:34,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-12 14:41:34,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294503189] [2024-10-12 14:41:34,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:41:34,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-12 14:41:34,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:41:34,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-12 14:41:34,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-12 14:41:34,689 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:41:34,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:41:34,723 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2024-10-12 14:41:34,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 14:41:34,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-10-12 14:41:34,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:41:34,724 INFO L225 Difference]: With dead ends: 24 [2024-10-12 14:41:34,725 INFO L226 Difference]: Without dead ends: 22 [2024-10-12 14:41:34,725 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-12 14:41:34,726 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:41:34,727 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:41:34,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-10-12 14:41:34,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-10-12 14:41:34,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:41:34,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2024-10-12 14:41:34,731 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 14 [2024-10-12 14:41:34,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:41:34,732 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2024-10-12 14:41:34,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:41:34,732 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2024-10-12 14:41:34,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-12 14:41:34,733 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:41:34,733 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:41:34,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-12 14:41:34,733 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:41:34,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:41:34,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1175880225, now seen corresponding path program 1 times [2024-10-12 14:41:34,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:41:34,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322866702] [2024-10-12 14:41:34,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:41:34,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:41:34,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:41:35,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:41:35,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:41:35,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322866702] [2024-10-12 14:41:35,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322866702] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:41:35,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:41:35,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 14:41:35,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123689961] [2024-10-12 14:41:35,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:41:35,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 14:41:35,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:41:35,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 14:41:35,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-12 14:41:35,025 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:41:35,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:41:35,104 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2024-10-12 14:41:35,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 14:41:35,105 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-10-12 14:41:35,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:41:35,107 INFO L225 Difference]: With dead ends: 42 [2024-10-12 14:41:35,107 INFO L226 Difference]: Without dead ends: 28 [2024-10-12 14:41:35,107 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-12 14:41:35,109 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 55 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:41:35,109 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 17 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:41:35,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-12 14:41:35,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2024-10-12 14:41:35,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:41:35,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2024-10-12 14:41:35,121 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 14 [2024-10-12 14:41:35,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:41:35,122 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2024-10-12 14:41:35,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:41:35,122 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2024-10-12 14:41:35,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-12 14:41:35,123 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:41:35,123 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:41:35,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-12 14:41:35,124 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:41:35,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:41:35,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1957529468, now seen corresponding path program 1 times [2024-10-12 14:41:35,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:41:35,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20023346] [2024-10-12 14:41:35,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:41:35,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:41:35,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:41:35,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 14:41:35,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:41:35,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20023346] [2024-10-12 14:41:35,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20023346] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:41:35,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:41:35,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-12 14:41:35,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613905398] [2024-10-12 14:41:35,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:41:35,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 14:41:35,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:41:35,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 14:41:35,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 14:41:35,249 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:41:35,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:41:35,270 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2024-10-12 14:41:35,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 14:41:35,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-10-12 14:41:35,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:41:35,272 INFO L225 Difference]: With dead ends: 37 [2024-10-12 14:41:35,272 INFO L226 Difference]: Without dead ends: 24 [2024-10-12 14:41:35,272 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 14:41:35,273 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:41:35,274 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 16 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:41:35,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-10-12 14:41:35,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-10-12 14:41:35,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:41:35,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-10-12 14:41:35,286 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 20 [2024-10-12 14:41:35,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:41:35,286 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-10-12 14:41:35,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:41:35,286 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-10-12 14:41:35,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-12 14:41:35,287 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:41:35,287 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:41:35,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-12 14:41:35,288 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:41:35,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:41:35,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1657379458, now seen corresponding path program 1 times [2024-10-12 14:41:35,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:41:35,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224953295] [2024-10-12 14:41:35,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:41:35,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:41:35,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:41:35,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:41:35,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:41:35,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224953295] [2024-10-12 14:41:35,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224953295] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:41:35,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680638556] [2024-10-12 14:41:35,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:41:35,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:41:35,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:41:35,927 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:41:35,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 14:41:36,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:41:36,009 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-12 14:41:36,018 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:41:36,178 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 [2024-10-12 14:41:36,214 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:41:36,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2024-10-12 14:41:36,286 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 [2024-10-12 14:41:36,331 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:41:36,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 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 [2024-10-12 14:41:36,424 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:41:36,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2024-10-12 14:41:36,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:41:36,454 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:41:36,549 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 17 treesize of output 15 [2024-10-12 14:41:36,553 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 22 treesize of output 20 [2024-10-12 14:41:36,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 14:41:36,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680638556] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:41:36,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:41:36,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 7] total 20 [2024-10-12 14:41:36,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763280257] [2024-10-12 14:41:36,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:41:36,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-12 14:41:36,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:41:36,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-12 14:41:36,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2024-10-12 14:41:36,605 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:41:36,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:41:36,922 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2024-10-12 14:41:36,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-12 14:41:36,924 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-10-12 14:41:36,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:41:36,925 INFO L225 Difference]: With dead ends: 60 [2024-10-12 14:41:36,925 INFO L226 Difference]: Without dead ends: 42 [2024-10-12 14:41:36,926 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2024-10-12 14:41:36,927 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 124 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:41:36,928 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 75 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:41:36,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-12 14:41:36,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 26. [2024-10-12 14:41:36,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:41:36,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2024-10-12 14:41:36,933 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 20 [2024-10-12 14:41:36,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:41:36,934 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2024-10-12 14:41:36,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:41:36,934 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2024-10-12 14:41:36,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-12 14:41:36,935 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:41:36,935 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:41:36,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-12 14:41:37,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:41:37,140 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:41:37,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:41:37,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1879775925, now seen corresponding path program 1 times [2024-10-12 14:41:37,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:41:37,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587662973] [2024-10-12 14:41:37,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:41:37,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:41:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:41:37,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 14:41:37,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:41:37,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587662973] [2024-10-12 14:41:37,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587662973] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:41:37,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307268623] [2024-10-12 14:41:37,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:41:37,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:41:37,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:41:37,482 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:41:37,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 14:41:37,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:41:37,543 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-12 14:41:37,545 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:41:37,573 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 [2024-10-12 14:41:37,586 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:41:37,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2024-10-12 14:41:37,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 14:41:37,645 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:41:37,715 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 17 treesize of output 15 [2024-10-12 14:41:37,717 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 16 treesize of output 12 [2024-10-12 14:41:37,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 14:41:37,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307268623] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:41:37,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:41:37,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 14 [2024-10-12 14:41:37,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174043030] [2024-10-12 14:41:37,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:41:37,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-12 14:41:37,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:41:37,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-12 14:41:37,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-10-12 14:41:37,732 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:41:37,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:41:37,904 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2024-10-12 14:41:37,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-12 14:41:37,905 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-10-12 14:41:37,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:41:37,905 INFO L225 Difference]: With dead ends: 42 [2024-10-12 14:41:37,906 INFO L226 Difference]: Without dead ends: 40 [2024-10-12 14:41:37,906 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2024-10-12 14:41:37,907 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:41:37,907 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 78 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:41:37,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-10-12 14:41:37,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2024-10-12 14:41:37,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:41:37,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-10-12 14:41:37,912 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 25 [2024-10-12 14:41:37,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:41:37,913 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-10-12 14:41:37,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:41:37,913 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-10-12 14:41:37,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-12 14:41:37,914 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:41:37,914 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:41:37,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-12 14:41:38,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-12 14:41:38,115 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:41:38,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:41:38,115 INFO L85 PathProgramCache]: Analyzing trace with hash 2092568542, now seen corresponding path program 2 times [2024-10-12 14:41:38,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:41:38,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312227470] [2024-10-12 14:41:38,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:41:38,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:41:38,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:41:38,342 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 14:41:38,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:41:38,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312227470] [2024-10-12 14:41:38,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312227470] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:41:38,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881412280] [2024-10-12 14:41:38,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 14:41:38,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:41:38,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:41:38,345 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:41:38,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 14:41:38,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 14:41:38,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:41:38,411 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-12 14:41:38,413 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:41:38,714 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 14:41:38,715 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:41:38,867 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 14:41:38,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881412280] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:41:38,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:41:38,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2024-10-12 14:41:38,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321984072] [2024-10-12 14:41:38,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:41:38,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-12 14:41:38,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:41:38,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-12 14:41:38,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2024-10-12 14:41:38,870 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 25 states, 25 states have (on average 3.2) internal successors, (80), 25 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:41:39,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:41:39,053 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2024-10-12 14:41:39,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-12 14:41:39,053 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 25 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-10-12 14:41:39,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:41:39,054 INFO L225 Difference]: With dead ends: 81 [2024-10-12 14:41:39,055 INFO L226 Difference]: Without dead ends: 44 [2024-10-12 14:41:39,056 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2024-10-12 14:41:39,057 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 224 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:41:39,057 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 70 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:41:39,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-12 14:41:39,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2024-10-12 14:41:39,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:41:39,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2024-10-12 14:41:39,064 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 30 [2024-10-12 14:41:39,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:41:39,064 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2024-10-12 14:41:39,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 25 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:41:39,064 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2024-10-12 14:41:39,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-12 14:41:39,065 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:41:39,065 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:41:39,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-12 14:41:39,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:41:39,266 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:41:39,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:41:39,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1602392481, now seen corresponding path program 3 times [2024-10-12 14:41:39,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:41:39,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218950398] [2024-10-12 14:41:39,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:41:39,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:41:39,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:41:39,923 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 14:41:39,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:41:39,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218950398] [2024-10-12 14:41:39,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218950398] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:41:39,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122290694] [2024-10-12 14:41:39,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 14:41:39,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:41:39,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:41:39,927 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:41:39,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 14:41:39,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-12 14:41:39,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:41:39,999 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-10-12 14:41:40,002 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:41:40,096 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 [2024-10-12 14:41:40,122 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:41:40,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2024-10-12 14:41:40,201 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 23 treesize of output 22 [2024-10-12 14:41:40,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 14:41:40,252 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:41:40,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 36 [2024-10-12 14:41:40,328 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-10-12 14:41:40,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2024-10-12 14:41:40,400 INFO L349 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2024-10-12 14:41:40,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 53 treesize of output 50 [2024-10-12 14:41:40,801 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 14:41:40,801 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:41:41,198 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 37 treesize of output 33 [2024-10-12 14:41:41,201 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 43 treesize of output 35 [2024-10-12 14:41:41,379 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 14:41:41,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122290694] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:41:41,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:41:41,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 14] total 38 [2024-10-12 14:41:41,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643973689] [2024-10-12 14:41:41,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:41:41,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-12 14:41:41,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:41:41,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-12 14:41:41,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1230, Unknown=0, NotChecked=0, Total=1406 [2024-10-12 14:41:41,382 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:41:42,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:41:42,219 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2024-10-12 14:41:42,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-12 14:41:42,219 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-10-12 14:41:42,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:41:42,222 INFO L225 Difference]: With dead ends: 63 [2024-10-12 14:41:42,222 INFO L226 Difference]: Without dead ends: 54 [2024-10-12 14:41:42,223 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=539, Invalid=2767, Unknown=0, NotChecked=0, Total=3306 [2024-10-12 14:41:42,224 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 122 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-12 14:41:42,226 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 93 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-12 14:41:42,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-12 14:41:42,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2024-10-12 14:41:42,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:41:42,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2024-10-12 14:41:42,233 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 36 [2024-10-12 14:41:42,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:41:42,233 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2024-10-12 14:41:42,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:41:42,233 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2024-10-12 14:41:42,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-12 14:41:42,234 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:41:42,234 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:41:42,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-12 14:41:42,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:41:42,439 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:41:42,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:41:42,439 INFO L85 PathProgramCache]: Analyzing trace with hash -2015660428, now seen corresponding path program 4 times [2024-10-12 14:41:42,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:41:42,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088767619] [2024-10-12 14:41:42,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:41:42,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:41:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:41:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:41:43,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:41:43,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088767619] [2024-10-12 14:41:43,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088767619] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:41:43,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825594337] [2024-10-12 14:41:43,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 14:41:43,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:41:43,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:41:43,023 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:41:43,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-12 14:41:43,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 14:41:43,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:41:43,093 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-12 14:41:43,096 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:41:43,115 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 13 treesize of output 9 [2024-10-12 14:41:43,137 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:41:43,138 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 1 case distinctions, treesize of input 25 treesize of output 20 [2024-10-12 14:41:43,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 23 treesize of output 22 [2024-10-12 14:41:43,187 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:41:43,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 34 [2024-10-12 14:41:43,442 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 14:41:43,443 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:41:43,665 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 83 treesize of output 75 [2024-10-12 14:41:43,670 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:41:43,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 143 [2024-10-12 14:41:43,688 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 14:41:43,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825594337] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:41:43,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:41:43,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 13] total 37 [2024-10-12 14:41:43,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582686791] [2024-10-12 14:41:43,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:41:43,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-10-12 14:41:43,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:41:43,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-10-12 14:41:43,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1163, Unknown=0, NotChecked=0, Total=1332 [2024-10-12 14:41:43,691 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 37 states, 37 states have (on average 2.810810810810811) internal successors, (104), 37 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:41:45,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:41:45,266 INFO L93 Difference]: Finished difference Result 153 states and 171 transitions. [2024-10-12 14:41:45,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-10-12 14:41:45,267 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.810810810810811) internal successors, (104), 37 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-10-12 14:41:45,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:41:45,268 INFO L225 Difference]: With dead ends: 153 [2024-10-12 14:41:45,268 INFO L226 Difference]: Without dead ends: 128 [2024-10-12 14:41:45,270 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2547 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1308, Invalid=7434, Unknown=0, NotChecked=0, Total=8742 [2024-10-12 14:41:45,271 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 299 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-12 14:41:45,271 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 110 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-12 14:41:45,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-10-12 14:41:45,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 68. [2024-10-12 14:41:45,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 67 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:41:45,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2024-10-12 14:41:45,282 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 41 [2024-10-12 14:41:45,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:41:45,283 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2024-10-12 14:41:45,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.810810810810811) internal successors, (104), 37 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:41:45,283 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2024-10-12 14:41:45,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-12 14:41:45,284 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:41:45,284 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:41:45,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-12 14:41:45,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:41:45,485 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:41:45,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:41:45,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1440232319, now seen corresponding path program 5 times [2024-10-12 14:41:45,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:41:45,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782173016] [2024-10-12 14:41:45,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:41:45,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:41:45,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:41:45,841 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 14:41:45,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:41:45,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782173016] [2024-10-12 14:41:45,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782173016] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:41:45,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913281116] [2024-10-12 14:41:45,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-12 14:41:45,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:41:45,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:41:45,844 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:41:45,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-12 14:41:45,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-10-12 14:41:45,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:41:45,939 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-12 14:41:45,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:41:46,326 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 46 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 14:41:46,326 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:41:46,485 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 46 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 14:41:46,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913281116] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:41:46,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:41:46,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 33 [2024-10-12 14:41:46,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313420274] [2024-10-12 14:41:46,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:41:46,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-12 14:41:46,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:41:46,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-12 14:41:46,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2024-10-12 14:41:46,488 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 33 states, 33 states have (on average 3.5757575757575757) internal successors, (118), 33 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:41:46,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:41:46,690 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2024-10-12 14:41:46,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-12 14:41:46,690 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.5757575757575757) internal successors, (118), 33 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-10-12 14:41:46,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:41:46,692 INFO L225 Difference]: With dead ends: 116 [2024-10-12 14:41:46,692 INFO L226 Difference]: Without dead ends: 67 [2024-10-12 14:41:46,693 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=392, Invalid=1090, Unknown=0, NotChecked=0, Total=1482 [2024-10-12 14:41:46,694 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 201 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:41:46,694 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 145 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:41:46,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-10-12 14:41:46,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2024-10-12 14:41:46,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.096774193548387) internal successors, (68), 62 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:41:46,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2024-10-12 14:41:46,703 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 46 [2024-10-12 14:41:46,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:41:46,704 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2024-10-12 14:41:46,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.5757575757575757) internal successors, (118), 33 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:41:46,704 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2024-10-12 14:41:46,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-12 14:41:46,705 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:41:46,705 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:41:46,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-12 14:41:46,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:41:46,908 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:41:46,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:41:46,908 INFO L85 PathProgramCache]: Analyzing trace with hash 5331550, now seen corresponding path program 6 times [2024-10-12 14:41:46,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:41:46,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640982136] [2024-10-12 14:41:46,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:41:46,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:41:46,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:41:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 14:41:47,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:41:47,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640982136] [2024-10-12 14:41:47,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640982136] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:41:47,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367300484] [2024-10-12 14:41:47,684 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-12 14:41:47,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:41:47,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:41:47,686 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:41:47,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-12 14:41:47,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-10-12 14:41:47,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:41:47,794 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-12 14:41:47,798 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:41:47,877 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 [2024-10-12 14:41:47,909 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:41:47,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2024-10-12 14:41:47,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 14:41:47,953 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 23 treesize of output 22 [2024-10-12 14:41:47,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 14:41:47,999 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:41:48,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 36 [2024-10-12 14:41:48,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 14:41:48,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 14:41:48,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 14:41:48,084 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:41:48,084 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 34 treesize of output 36 [2024-10-12 14:41:48,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 14:41:48,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 14:41:48,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 14:41:48,147 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:41:48,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 50 [2024-10-12 14:41:53,053 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 26 proven. 11 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-10-12 14:41:53,053 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:41:55,662 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 92 treesize of output 84 [2024-10-12 14:41:55,666 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 98 treesize of output 94 [2024-10-12 14:41:55,758 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-10-12 14:41:55,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367300484] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:41:55,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:41:55,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 34 [2024-10-12 14:41:55,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526106710] [2024-10-12 14:41:55,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:41:55,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-12 14:41:55,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:41:55,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-12 14:41:55,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=950, Unknown=3, NotChecked=0, Total=1122 [2024-10-12 14:41:55,760 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 34 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:42:04,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 14:42:13,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:42:13,666 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2024-10-12 14:42:13,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-10-12 14:42:13,667 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 34 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-10-12 14:42:13,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:42:13,667 INFO L225 Difference]: With dead ends: 94 [2024-10-12 14:42:13,668 INFO L226 Difference]: Without dead ends: 75 [2024-10-12 14:42:13,669 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=793, Invalid=3757, Unknown=6, NotChecked=0, Total=4556 [2024-10-12 14:42:13,669 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 176 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 40 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-10-12 14:42:13,669 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 206 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 830 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2024-10-12 14:42:13,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-10-12 14:42:13,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2024-10-12 14:42:13,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.087719298245614) internal successors, (62), 57 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:42:13,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2024-10-12 14:42:13,678 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 52 [2024-10-12 14:42:13,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:42:13,678 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2024-10-12 14:42:13,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 34 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:42:13,679 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2024-10-12 14:42:13,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-10-12 14:42:13,679 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:42:13,679 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:42:13,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-12 14:42:13,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:42:13,880 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:42:13,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:42:13,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1041674349, now seen corresponding path program 7 times [2024-10-12 14:42:13,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:42:13,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819397577] [2024-10-12 14:42:13,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:42:13,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:42:13,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:42:14,958 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 40 proven. 45 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-12 14:42:14,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:42:14,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819397577] [2024-10-12 14:42:14,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819397577] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:42:14,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246404901] [2024-10-12 14:42:14,959 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-12 14:42:14,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:42:14,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:42:14,961 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:42:14,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-12 14:42:15,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:42:15,064 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-12 14:42:15,071 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:42:15,186 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 [2024-10-12 14:42:15,221 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:42:15,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2024-10-12 14:42:15,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 14:42:15,260 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 23 treesize of output 22 [2024-10-12 14:42:15,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 14:42:15,308 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:42:15,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 36 [2024-10-12 14:42:15,723 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-12 14:42:15,723 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:42:15,898 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 42 treesize of output 38 [2024-10-12 14:42:15,901 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 46 treesize of output 42 [2024-10-12 14:42:15,990 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 40 proven. 33 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-12 14:42:15,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246404901] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:42:15,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:42:15,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 13] total 41 [2024-10-12 14:42:15,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556222032] [2024-10-12 14:42:15,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:42:15,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-10-12 14:42:15,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:42:15,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-10-12 14:42:15,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2024-10-12 14:42:15,993 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 41 states, 41 states have (on average 3.1219512195121952) internal successors, (128), 41 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:42:22,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:42:22,036 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2024-10-12 14:42:22,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-12 14:42:22,037 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.1219512195121952) internal successors, (128), 41 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2024-10-12 14:42:22,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:42:22,037 INFO L225 Difference]: With dead ends: 74 [2024-10-12 14:42:22,037 INFO L226 Difference]: Without dead ends: 60 [2024-10-12 14:42:22,038 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=561, Invalid=2742, Unknown=3, NotChecked=0, Total=3306 [2024-10-12 14:42:22,039 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 155 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-12 14:42:22,039 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 246 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 659 Invalid, 1 Unknown, 0 Unchecked, 0.6s Time] [2024-10-12 14:42:22,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-12 14:42:22,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2024-10-12 14:42:22,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:42:22,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2024-10-12 14:42:22,047 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 57 [2024-10-12 14:42:22,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:42:22,047 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2024-10-12 14:42:22,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.1219512195121952) internal successors, (128), 41 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:42:22,047 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2024-10-12 14:42:22,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-10-12 14:42:22,048 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:42:22,048 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:42:22,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-12 14:42:22,248 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,SelfDestructingSolverStorable11 [2024-10-12 14:42:22,248 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:42:22,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:42:22,249 INFO L85 PathProgramCache]: Analyzing trace with hash -2052791599, now seen corresponding path program 8 times [2024-10-12 14:42:22,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:42:22,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288371128] [2024-10-12 14:42:22,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:42:22,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:42:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:42:23,123 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:42:23,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:42:23,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288371128] [2024-10-12 14:42:23,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288371128] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:42:23,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474254973] [2024-10-12 14:42:23,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 14:42:23,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:42:23,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:42:23,126 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:42:23,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-12 14:42:23,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 14:42:23,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:42:23,223 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-12 14:42:23,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:42:23,356 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 [2024-10-12 14:42:23,379 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:42:23,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2024-10-12 14:42:23,712 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 14:42:23,712 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:42:23,824 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 17 treesize of output 15 [2024-10-12 14:42:23,825 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 16 treesize of output 12 [2024-10-12 14:42:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 14:42:23,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474254973] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:42:23,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:42:23,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 16] total 38 [2024-10-12 14:42:23,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651164228] [2024-10-12 14:42:23,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:42:23,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-12 14:42:23,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:42:23,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-12 14:42:23,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1236, Unknown=0, NotChecked=0, Total=1406 [2024-10-12 14:42:23,840 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 38 states, 38 states have (on average 3.526315789473684) internal successors, (134), 38 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:42:25,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:42:25,109 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2024-10-12 14:42:25,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-10-12 14:42:25,109 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.526315789473684) internal successors, (134), 38 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2024-10-12 14:42:25,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:42:25,110 INFO L225 Difference]: With dead ends: 92 [2024-10-12 14:42:25,110 INFO L226 Difference]: Without dead ends: 90 [2024-10-12 14:42:25,111 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=686, Invalid=4570, Unknown=0, NotChecked=0, Total=5256 [2024-10-12 14:42:25,112 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 194 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-12 14:42:25,112 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 189 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-12 14:42:25,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-10-12 14:42:25,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 63. [2024-10-12 14:42:25,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 62 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:42:25,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2024-10-12 14:42:25,122 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 57 [2024-10-12 14:42:25,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:42:25,122 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2024-10-12 14:42:25,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.526315789473684) internal successors, (134), 38 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:42:25,123 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2024-10-12 14:42:25,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-10-12 14:42:25,123 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:42:25,123 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:42:25,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-12 14:42:25,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-12 14:42:25,328 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:42:25,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:42:25,328 INFO L85 PathProgramCache]: Analyzing trace with hash 2009397570, now seen corresponding path program 9 times [2024-10-12 14:42:25,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:42:25,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894326993] [2024-10-12 14:42:25,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:42:25,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:42:25,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:42:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 38 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 14:42:25,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:42:25,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894326993] [2024-10-12 14:42:25,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894326993] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:42:25,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449519785] [2024-10-12 14:42:25,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 14:42:25,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:42:25,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:42:25,743 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:42:25,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-12 14:42:25,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-10-12 14:42:25,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:42:25,893 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-12 14:42:25,895 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:42:25,974 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 13 treesize of output 9 [2024-10-12 14:42:25,999 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:42:26,000 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 1 case distinctions, treesize of input 29 treesize of output 22 [2024-10-12 14:42:26,217 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 37 proven. 72 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-12 14:42:26,217 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:42:26,371 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 17 treesize of output 15 [2024-10-12 14:42:26,373 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 20 treesize of output 16 [2024-10-12 14:42:26,495 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 37 proven. 72 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-12 14:42:26,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449519785] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:42:26,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:42:26,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 39 [2024-10-12 14:42:26,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707879139] [2024-10-12 14:42:26,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:42:26,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-10-12 14:42:26,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:42:26,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-10-12 14:42:26,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2024-10-12 14:42:26,505 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 39 states, 39 states have (on average 3.8974358974358974) internal successors, (152), 39 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:42:27,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:42:27,851 INFO L93 Difference]: Finished difference Result 174 states and 190 transitions. [2024-10-12 14:42:27,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-10-12 14:42:27,852 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.8974358974358974) internal successors, (152), 39 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2024-10-12 14:42:27,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:42:27,853 INFO L225 Difference]: With dead ends: 174 [2024-10-12 14:42:27,853 INFO L226 Difference]: Without dead ends: 91 [2024-10-12 14:42:27,855 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=892, Invalid=5428, Unknown=0, NotChecked=0, Total=6320 [2024-10-12 14:42:27,855 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 390 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-12 14:42:27,856 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 332 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-12 14:42:27,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-10-12 14:42:27,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 69. [2024-10-12 14:42:27,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:42:27,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2024-10-12 14:42:27,867 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 62 [2024-10-12 14:42:27,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:42:27,867 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2024-10-12 14:42:27,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.8974358974358974) internal successors, (152), 39 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:42:27,868 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2024-10-12 14:42:27,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-12 14:42:27,868 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:42:27,868 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:42:27,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-12 14:42:28,069 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,SelfDestructingSolverStorable13 [2024-10-12 14:42:28,070 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:42:28,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:42:28,071 INFO L85 PathProgramCache]: Analyzing trace with hash 215400069, now seen corresponding path program 10 times [2024-10-12 14:42:28,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:42:28,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85159682] [2024-10-12 14:42:28,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:42:28,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:42:28,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:42:28,977 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 12 proven. 109 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-12 14:42:28,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:42:28,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85159682] [2024-10-12 14:42:28,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85159682] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:42:28,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066515417] [2024-10-12 14:42:28,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 14:42:28,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:42:28,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:42:28,979 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:42:28,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-12 14:42:29,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 14:42:29,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:42:29,083 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-10-12 14:42:29,086 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:42:29,203 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 19 treesize of output 1 [2024-10-12 14:42:29,231 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:42:29,231 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 1 case distinctions, treesize of input 29 treesize of output 22 [2024-10-12 14:42:29,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 23 treesize of output 22 [2024-10-12 14:42:29,306 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:42:29,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 32 [2024-10-12 14:42:29,337 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:42:29,338 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 1 case distinctions, treesize of input 32 treesize of output 34 [2024-10-12 14:42:29,374 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:42:29,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 46 [2024-10-12 14:42:29,411 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:42:29,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 46 [2024-10-12 14:42:29,455 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:42:29,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 58 [2024-10-12 14:42:29,499 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:42:29,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 58 [2024-10-12 14:42:29,543 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:42:29,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 65 treesize of output 61 [2024-10-12 14:42:30,114 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:42:30,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 19 [2024-10-12 14:42:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 12 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:42:30,118 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:42:30,520 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 19 treesize of output 17 [2024-10-12 14:42:30,522 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 24 treesize of output 20 [2024-10-12 14:42:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 12 proven. 109 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-12 14:42:30,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066515417] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:42:30,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:42:30,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 25, 16] total 46 [2024-10-12 14:42:30,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816030517] [2024-10-12 14:42:30,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:42:30,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-10-12 14:42:30,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:42:30,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-10-12 14:42:30,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1903, Unknown=0, NotChecked=0, Total=2070 [2024-10-12 14:42:30,547 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 46 states, 46 states have (on average 3.5) internal successors, (161), 46 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:42:32,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:42:32,124 INFO L93 Difference]: Finished difference Result 102 states and 111 transitions. [2024-10-12 14:42:32,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-10-12 14:42:32,124 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.5) internal successors, (161), 46 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2024-10-12 14:42:32,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:42:32,125 INFO L225 Difference]: With dead ends: 102 [2024-10-12 14:42:32,125 INFO L226 Difference]: Without dead ends: 93 [2024-10-12 14:42:32,126 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 105 SyntacticMatches, 11 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1776 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=557, Invalid=5143, Unknown=0, NotChecked=0, Total=5700 [2024-10-12 14:42:32,127 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 187 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 1852 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 1906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-12 14:42:32,127 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 393 Invalid, 1906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1852 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-12 14:42:32,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-10-12 14:42:32,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2024-10-12 14:42:32,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:42:32,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2024-10-12 14:42:32,140 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 68 [2024-10-12 14:42:32,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:42:32,140 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2024-10-12 14:42:32,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.5) internal successors, (161), 46 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:42:32,141 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2024-10-12 14:42:32,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-10-12 14:42:32,142 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:42:32,142 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:42:32,158 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-12 14:42:32,345 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,SelfDestructingSolverStorable14 [2024-10-12 14:42:32,346 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:42:32,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:42:32,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1347662322, now seen corresponding path program 11 times [2024-10-12 14:42:32,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:42:32,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559189734] [2024-10-12 14:42:32,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:42:32,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:42:32,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:42:33,354 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:42:33,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:42:33,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559189734] [2024-10-12 14:42:33,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559189734] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:42:33,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934427738] [2024-10-12 14:42:33,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-12 14:42:33,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:42:33,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:42:33,357 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:42:33,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-12 14:42:33,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-10-12 14:42:33,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:42:33,567 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-12 14:42:33,568 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:42:33,706 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 [2024-10-12 14:42:33,734 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:42:33,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2024-10-12 14:42:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-12 14:42:34,071 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:42:34,167 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 17 treesize of output 15 [2024-10-12 14:42:34,169 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 16 treesize of output 12 [2024-10-12 14:42:34,179 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-12 14:42:34,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934427738] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:42:34,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:42:34,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 18, 17] total 41 [2024-10-12 14:42:34,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818416518] [2024-10-12 14:42:34,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:42:34,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-10-12 14:42:34,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:42:34,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-10-12 14:42:34,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2024-10-12 14:42:34,181 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 41 states, 41 states have (on average 3.902439024390244) internal successors, (160), 41 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:42:35,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:42:35,965 INFO L93 Difference]: Finished difference Result 117 states and 130 transitions. [2024-10-12 14:42:35,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-10-12 14:42:35,966 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.902439024390244) internal successors, (160), 41 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2024-10-12 14:42:35,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:42:35,966 INFO L225 Difference]: With dead ends: 117 [2024-10-12 14:42:35,966 INFO L226 Difference]: Without dead ends: 115 [2024-10-12 14:42:35,968 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2054 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=885, Invalid=6771, Unknown=0, NotChecked=0, Total=7656 [2024-10-12 14:42:35,969 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 271 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-12 14:42:35,969 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 328 Invalid, 1854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1745 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-12 14:42:35,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-10-12 14:42:35,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 79. [2024-10-12 14:42:35,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.064102564102564) internal successors, (83), 78 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:42:35,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2024-10-12 14:42:35,981 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 73 [2024-10-12 14:42:35,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:42:35,981 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2024-10-12 14:42:35,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.902439024390244) internal successors, (160), 41 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:42:35,981 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2024-10-12 14:42:35,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-10-12 14:42:35,982 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:42:35,982 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:42:35,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-12 14:42:36,182 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,SelfDestructingSolverStorable15 [2024-10-12 14:42:36,183 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:42:36,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:42:36,183 INFO L85 PathProgramCache]: Analyzing trace with hash 2025851941, now seen corresponding path program 12 times [2024-10-12 14:42:36,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:42:36,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139026868] [2024-10-12 14:42:36,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:42:36,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:42:36,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:42:36,739 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 136 proven. 58 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-12 14:42:36,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:42:36,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139026868] [2024-10-12 14:42:36,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139026868] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:42:36,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810013261] [2024-10-12 14:42:36,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-12 14:42:36,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:42:36,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:42:36,741 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:42:36,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-12 14:42:36,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-10-12 14:42:36,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:42:36,910 INFO L255 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-12 14:42:36,913 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:42:37,018 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 13 treesize of output 9 [2024-10-12 14:42:37,049 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:42:37,050 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 1 case distinctions, treesize of input 29 treesize of output 22 [2024-10-12 14:42:37,364 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 51 proven. 141 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-12 14:42:37,365 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:42:37,581 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 17 treesize of output 15 [2024-10-12 14:42:37,582 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 20 treesize of output 16 [2024-10-12 14:42:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 51 proven. 141 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-12 14:42:37,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810013261] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:42:37,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:42:37,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 48 [2024-10-12 14:42:37,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701190271] [2024-10-12 14:42:37,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:42:37,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-10-12 14:42:37,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:42:37,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-10-12 14:42:37,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2037, Unknown=0, NotChecked=0, Total=2256 [2024-10-12 14:42:37,717 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 48 states, 48 states have (on average 3.9791666666666665) internal successors, (191), 48 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:42:39,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:42:39,953 INFO L93 Difference]: Finished difference Result 222 states and 241 transitions. [2024-10-12 14:42:39,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-10-12 14:42:39,954 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.9791666666666665) internal successors, (191), 48 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2024-10-12 14:42:39,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:42:39,954 INFO L225 Difference]: With dead ends: 222 [2024-10-12 14:42:39,954 INFO L226 Difference]: Without dead ends: 116 [2024-10-12 14:42:39,956 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2949 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1273, Invalid=9439, Unknown=0, NotChecked=0, Total=10712 [2024-10-12 14:42:39,956 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 479 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 1577 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 1713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-12 14:42:39,957 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 563 Invalid, 1713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1577 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-12 14:42:39,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-10-12 14:42:39,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 85. [2024-10-12 14:42:39,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:42:39,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2024-10-12 14:42:39,969 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 78 [2024-10-12 14:42:39,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:42:39,969 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2024-10-12 14:42:39,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.9791666666666665) internal successors, (191), 48 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:42:39,970 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2024-10-12 14:42:39,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-10-12 14:42:39,970 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:42:39,970 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:42:39,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-12 14:42:40,170 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,SelfDestructingSolverStorable16 [2024-10-12 14:42:40,171 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:42:40,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:42:40,171 INFO L85 PathProgramCache]: Analyzing trace with hash 2129772614, now seen corresponding path program 13 times [2024-10-12 14:42:40,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:42:40,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726297203] [2024-10-12 14:42:40,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:42:40,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:42:40,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:42:42,243 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 16 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:42:42,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:42:42,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726297203] [2024-10-12 14:42:42,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726297203] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:42:42,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599728408] [2024-10-12 14:42:42,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-12 14:42:42,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:42:42,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:42:42,246 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:42:42,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-12 14:42:42,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:42:42,368 INFO L255 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-10-12 14:42:42,371 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:42:42,585 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 [2024-10-12 14:42:42,621 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:42:42,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2024-10-12 14:42:42,695 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 [2024-10-12 14:42:42,737 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:42:42,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2024-10-12 14:42:42,788 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:42:42,789 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 [2024-10-12 14:42:42,842 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:42:42,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 38 [2024-10-12 14:42:42,896 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:42:42,897 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 [2024-10-12 14:42:42,960 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:42:42,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 48 [2024-10-12 14:42:43,024 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:42:43,024 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 [2024-10-12 14:42:43,083 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:42:43,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 58 [2024-10-12 14:42:43,157 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:42:43,157 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 [2024-10-12 14:42:43,222 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:42:43,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 61 [2024-10-12 14:42:44,301 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:42:44,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 50 treesize of output 22 [2024-10-12 14:42:44,309 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 16 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:42:44,309 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:42:45,034 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 19 treesize of output 17 [2024-10-12 14:42:45,038 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 24 treesize of output 20 [2024-10-12 14:42:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 16 proven. 191 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-12 14:42:45,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599728408] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:42:45,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:42:45,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30, 19] total 71 [2024-10-12 14:42:45,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284650044] [2024-10-12 14:42:45,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:42:45,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-10-12 14:42:45,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:42:45,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-10-12 14:42:45,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=4668, Unknown=0, NotChecked=0, Total=4970 [2024-10-12 14:42:45,332 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 71 states, 71 states have (on average 3.23943661971831) internal successors, (230), 71 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:42:49,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:42:49,039 INFO L93 Difference]: Finished difference Result 124 states and 135 transitions. [2024-10-12 14:42:49,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-10-12 14:42:49,040 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.23943661971831) internal successors, (230), 71 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2024-10-12 14:42:49,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:42:49,040 INFO L225 Difference]: With dead ends: 124 [2024-10-12 14:42:49,040 INFO L226 Difference]: Without dead ends: 115 [2024-10-12 14:42:49,041 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 125 SyntacticMatches, 5 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3744 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1243, Invalid=12799, Unknown=0, NotChecked=0, Total=14042 [2024-10-12 14:42:49,042 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 500 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 2994 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 3181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 2994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-10-12 14:42:49,042 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 612 Invalid, 3181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 2994 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-10-12 14:42:49,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-10-12 14:42:49,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 90. [2024-10-12 14:42:49,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 89 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:42:49,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2024-10-12 14:42:49,060 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 84 [2024-10-12 14:42:49,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:42:49,060 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2024-10-12 14:42:49,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.23943661971831) internal successors, (230), 71 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:42:49,060 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2024-10-12 14:42:49,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-10-12 14:42:49,061 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:42:49,061 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:42:49,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-12 14:42:49,261 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:42:49,262 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:42:49,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:42:49,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1419853037, now seen corresponding path program 14 times [2024-10-12 14:42:49,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:42:49,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579953396] [2024-10-12 14:42:49,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:42:49,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:42:49,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:42:50,447 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:42:50,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:42:50,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579953396] [2024-10-12 14:42:50,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579953396] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:42:50,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391825236] [2024-10-12 14:42:50,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 14:42:50,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:42:50,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:42:50,449 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:42:50,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-12 14:42:50,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 14:42:50,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:42:50,580 INFO L255 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-10-12 14:42:50,583 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:42:50,774 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 [2024-10-12 14:42:50,810 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:42:50,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2024-10-12 14:42:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 285 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 14:42:51,358 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:42:51,526 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 17 treesize of output 15 [2024-10-12 14:42:51,528 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 16 treesize of output 12 [2024-10-12 14:42:51,541 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 251 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-12 14:42:51,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391825236] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:42:51,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:42:51,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 23, 22] total 52 [2024-10-12 14:42:51,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419804780] [2024-10-12 14:42:51,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:42:51,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-10-12 14:42:51,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:42:51,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-10-12 14:42:51,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=2415, Unknown=0, NotChecked=0, Total=2652 [2024-10-12 14:42:51,543 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 52 states, 52 states have (on average 3.923076923076923) internal successors, (204), 52 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:42:54,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:42:54,049 INFO L93 Difference]: Finished difference Result 142 states and 158 transitions. [2024-10-12 14:42:54,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-10-12 14:42:54,050 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.923076923076923) internal successors, (204), 52 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2024-10-12 14:42:54,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:42:54,050 INFO L225 Difference]: With dead ends: 142 [2024-10-12 14:42:54,050 INFO L226 Difference]: Without dead ends: 140 [2024-10-12 14:42:54,052 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3275 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1158, Invalid=10832, Unknown=0, NotChecked=0, Total=11990 [2024-10-12 14:42:54,052 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 318 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 2399 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 2557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 2399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:42:54,053 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 417 Invalid, 2557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 2399 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-12 14:42:54,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-10-12 14:42:54,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 95. [2024-10-12 14:42:54,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.053191489361702) internal successors, (99), 94 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:42:54,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2024-10-12 14:42:54,067 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 89 [2024-10-12 14:42:54,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:42:54,067 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2024-10-12 14:42:54,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.923076923076923) internal successors, (204), 52 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:42:54,068 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2024-10-12 14:42:54,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-10-12 14:42:54,068 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:42:54,068 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:42:54,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-12 14:42:54,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:42:54,269 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:42:54,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:42:54,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1782091942, now seen corresponding path program 15 times [2024-10-12 14:42:54,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:42:54,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449500029] [2024-10-12 14:42:54,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:42:54,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:42:54,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:42:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 219 proven. 81 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-12 14:42:54,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:42:54,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449500029] [2024-10-12 14:42:54,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449500029] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:42:54,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698764352] [2024-10-12 14:42:54,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 14:42:54,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:42:54,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:42:54,955 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:42:54,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-12 14:42:55,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-10-12 14:42:55,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:42:55,411 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-12 14:42:55,413 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:42:55,528 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 13 treesize of output 9 [2024-10-12 14:42:55,551 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:42:55,551 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 1 case distinctions, treesize of input 29 treesize of output 22 [2024-10-12 14:42:56,044 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 65 proven. 233 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-10-12 14:42:56,044 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:42:56,337 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 17 treesize of output 15 [2024-10-12 14:42:56,339 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 20 treesize of output 16 [2024-10-12 14:42:56,522 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 65 proven. 233 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-10-12 14:42:56,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698764352] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:42:56,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:42:56,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 57 [2024-10-12 14:42:56,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195121123] [2024-10-12 14:42:56,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:42:56,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-10-12 14:42:56,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:42:56,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-10-12 14:42:56,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2913, Unknown=0, NotChecked=0, Total=3192 [2024-10-12 14:42:56,525 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand has 57 states, 57 states have (on average 4.035087719298246) internal successors, (230), 57 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)