./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/pr4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr4.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 14a75e050103eb09182e049a798a738dec478e3acaa4fb01ae8649b715b8362f --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-10 22:01:53,061 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-10 22:01:53,140 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-10 22:01:53,149 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-10 22:01:53,150 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-10 22:01:53,171 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-10 22:01:53,171 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-10 22:01:53,172 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-10 22:01:53,174 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-10 22:01:53,176 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-10 22:01:53,176 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-10 22:01:53,177 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-10 22:01:53,177 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-10 22:01:53,179 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-10 22:01:53,179 INFO L153 SettingsManager]: * Use SBE=true [2024-10-10 22:01:53,179 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-10 22:01:53,180 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-10 22:01:53,180 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-10 22:01:53,180 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-10 22:01:53,180 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-10 22:01:53,181 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-10 22:01:53,184 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-10 22:01:53,185 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-10 22:01:53,185 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-10 22:01:53,185 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-10 22:01:53,186 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-10 22:01:53,186 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-10 22:01:53,186 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-10 22:01:53,186 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-10 22:01:53,187 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-10 22:01:53,187 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-10 22:01:53,187 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-10 22:01:53,187 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 22:01:53,188 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-10 22:01:53,188 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-10 22:01:53,188 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-10 22:01:53,188 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-10 22:01:53,189 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-10 22:01:53,189 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-10 22:01:53,189 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-10 22:01:53,189 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-10 22:01:53,191 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-10 22:01:53,191 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14a75e050103eb09182e049a798a738dec478e3acaa4fb01ae8649b715b8362f [2024-10-10 22:01:53,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-10 22:01:53,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-10 22:01:53,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-10 22:01:53,449 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-10 22:01:53,449 INFO L274 PluginConnector]: CDTParser initialized [2024-10-10 22:01:53,450 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr4.c [2024-10-10 22:01:55,001 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-10 22:01:55,181 INFO L384 CDTParser]: Found 1 translation units. [2024-10-10 22:01:55,182 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr4.c [2024-10-10 22:01:55,189 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/627606acd/7d7dc5cfd86648eb9970b9af67ee2236/FLAGdcc0c7578 [2024-10-10 22:01:55,205 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/627606acd/7d7dc5cfd86648eb9970b9af67ee2236 [2024-10-10 22:01:55,207 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-10 22:01:55,209 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-10 22:01:55,210 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-10 22:01:55,210 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-10 22:01:55,217 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-10 22:01:55,218 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 10:01:55" (1/1) ... [2024-10-10 22:01:55,219 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b69085c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:01:55, skipping insertion in model container [2024-10-10 22:01:55,219 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 10:01:55" (1/1) ... [2024-10-10 22:01:55,244 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-10 22:01:55,411 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/pr4.c[394,407] [2024-10-10 22:01:55,434 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 22:01:55,445 INFO L200 MainTranslator]: Completed pre-run [2024-10-10 22:01:55,455 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/pr4.c[394,407] [2024-10-10 22:01:55,466 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 22:01:55,485 INFO L204 MainTranslator]: Completed translation [2024-10-10 22:01:55,486 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:01:55 WrapperNode [2024-10-10 22:01:55,486 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-10 22:01:55,487 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-10 22:01:55,487 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-10 22:01:55,487 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-10 22:01:55,494 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:01:55" (1/1) ... [2024-10-10 22:01:55,507 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:01:55" (1/1) ... [2024-10-10 22:01:55,525 INFO L138 Inliner]: procedures = 15, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 84 [2024-10-10 22:01:55,525 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-10 22:01:55,526 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-10 22:01:55,526 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-10 22:01:55,526 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-10 22:01:55,538 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:01:55" (1/1) ... [2024-10-10 22:01:55,538 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:01:55" (1/1) ... [2024-10-10 22:01:55,541 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:01:55" (1/1) ... [2024-10-10 22:01:55,554 INFO L175 MemorySlicer]: Split 18 memory accesses to 3 slices as follows [2, 6, 10]. 56 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 6, 0]. The 8 writes are split as follows [0, 0, 8]. [2024-10-10 22:01:55,554 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:01:55" (1/1) ... [2024-10-10 22:01:55,555 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:01:55" (1/1) ... [2024-10-10 22:01:55,566 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:01:55" (1/1) ... [2024-10-10 22:01:55,570 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:01:55" (1/1) ... [2024-10-10 22:01:55,571 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:01:55" (1/1) ... [2024-10-10 22:01:55,572 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:01:55" (1/1) ... [2024-10-10 22:01:55,574 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-10 22:01:55,575 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-10 22:01:55,575 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-10 22:01:55,575 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-10 22:01:55,576 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:01:55" (1/1) ... [2024-10-10 22:01:55,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 22:01:55,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:01:55,609 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-10 22:01:55,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-10 22:01:55,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-10 22:01:55,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-10 22:01:55,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-10 22:01:55,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-10 22:01:55,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-10 22:01:55,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-10 22:01:55,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-10 22:01:55,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-10 22:01:55,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-10 22:01:55,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-10 22:01:55,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-10 22:01:55,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-10 22:01:55,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-10 22:01:55,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-10 22:01:55,749 INFO L238 CfgBuilder]: Building ICFG [2024-10-10 22:01:55,751 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-10 22:01:55,986 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-10-10 22:01:55,990 INFO L287 CfgBuilder]: Performing block encoding [2024-10-10 22:01:56,023 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-10 22:01:56,023 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-10 22:01:56,023 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 10:01:56 BoogieIcfgContainer [2024-10-10 22:01:56,024 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-10 22:01:56,028 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-10 22:01:56,029 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-10 22:01:56,032 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-10 22:01:56,033 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.10 10:01:55" (1/3) ... [2024-10-10 22:01:56,034 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a4dfee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 10:01:56, skipping insertion in model container [2024-10-10 22:01:56,034 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:01:55" (2/3) ... [2024-10-10 22:01:56,035 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a4dfee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 10:01:56, skipping insertion in model container [2024-10-10 22:01:56,035 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 10:01:56" (3/3) ... [2024-10-10 22:01:56,036 INFO L112 eAbstractionObserver]: Analyzing ICFG pr4.c [2024-10-10 22:01:56,054 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-10 22:01:56,054 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-10 22:01:56,119 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-10 22:01:56,128 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;@75376d38, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-10 22:01:56,128 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-10 22:01:56,133 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 22 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) [2024-10-10 22:01:56,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-10 22:01:56,140 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:01:56,141 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:01:56,142 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:01:56,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:01:56,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1186880259, now seen corresponding path program 1 times [2024-10-10 22:01:56,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:01:56,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61395158] [2024-10-10 22:01:56,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:01:56,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:01:56,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:01:56,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:56,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:01:56,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61395158] [2024-10-10 22:01:56,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61395158] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:01:56,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:01:56,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-10 22:01:56,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062611533] [2024-10-10 22:01:56,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:01:56,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-10 22:01:56,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:01:56,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-10 22:01:56,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-10 22:01:56,377 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 22 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) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2024-10-10 22:01:56,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:01:56,400 INFO L93 Difference]: Finished difference Result 42 states and 63 transitions. [2024-10-10 22:01:56,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-10 22:01:56,403 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 12 [2024-10-10 22:01:56,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:01:56,410 INFO L225 Difference]: With dead ends: 42 [2024-10-10 22:01:56,410 INFO L226 Difference]: Without dead ends: 19 [2024-10-10 22:01:56,412 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 [2024-10-10 22:01:56,415 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:01:56,416 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:01:56,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-10-10 22:01:56,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-10-10 22:01:56,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2024-10-10 22:01:56,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2024-10-10 22:01:56,461 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 12 [2024-10-10 22:01:56,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:01:56,462 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2024-10-10 22:01:56,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2024-10-10 22:01:56,463 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2024-10-10 22:01:56,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-10 22:01:56,464 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:01:56,464 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:01:56,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-10 22:01:56,465 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:01:56,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:01:56,467 INFO L85 PathProgramCache]: Analyzing trace with hash -474624862, now seen corresponding path program 1 times [2024-10-10 22:01:56,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:01:56,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884035389] [2024-10-10 22:01:56,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:01:56,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:01:56,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:01:56,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:56,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:01:56,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884035389] [2024-10-10 22:01:56,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884035389] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:01:56,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:01:56,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-10 22:01:56,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816209163] [2024-10-10 22:01:56,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:01:56,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-10 22:01:56,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:01:56,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-10 22:01:56,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-10 22:01:56,677 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2024-10-10 22:01:56,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:01:56,707 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2024-10-10 22:01:56,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-10 22:01:56,708 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2024-10-10 22:01:56,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:01:56,709 INFO L225 Difference]: With dead ends: 23 [2024-10-10 22:01:56,709 INFO L226 Difference]: Without dead ends: 21 [2024-10-10 22:01:56,709 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 [2024-10-10 22:01:56,710 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:01:56,712 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:01:56,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-10-10 22:01:56,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-10-10 22:01:56,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.35) internal successors, (27), 20 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) [2024-10-10 22:01:56,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2024-10-10 22:01:56,721 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 12 [2024-10-10 22:01:56,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:01:56,722 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2024-10-10 22:01:56,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2024-10-10 22:01:56,722 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2024-10-10 22:01:56,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-10 22:01:56,723 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:01:56,723 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:01:56,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-10 22:01:56,724 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:01:56,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:01:56,725 INFO L85 PathProgramCache]: Analyzing trace with hash -474565280, now seen corresponding path program 1 times [2024-10-10 22:01:56,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:01:56,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182043186] [2024-10-10 22:01:56,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:01:56,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:01:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:01:57,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:57,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:01:57,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182043186] [2024-10-10 22:01:57,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182043186] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:01:57,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:01:57,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-10 22:01:57,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076989694] [2024-10-10 22:01:57,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:01:57,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-10 22:01:57,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:01:57,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-10 22:01:57,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-10 22:01:57,071 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2024-10-10 22:01:57,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:01:57,157 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2024-10-10 22:01:57,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-10 22:01:57,157 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 12 [2024-10-10 22:01:57,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:01:57,158 INFO L225 Difference]: With dead ends: 37 [2024-10-10 22:01:57,158 INFO L226 Difference]: Without dead ends: 27 [2024-10-10 22:01:57,158 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 [2024-10-10 22:01:57,159 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 69 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:01:57,160 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 16 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:01:57,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-10-10 22:01:57,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2024-10-10 22:01:57,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 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) [2024-10-10 22:01:57,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2024-10-10 22:01:57,170 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 12 [2024-10-10 22:01:57,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:01:57,170 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2024-10-10 22:01:57,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2024-10-10 22:01:57,171 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2024-10-10 22:01:57,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-10 22:01:57,172 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:01:57,172 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:01:57,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-10 22:01:57,173 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:01:57,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:01:57,174 INFO L85 PathProgramCache]: Analyzing trace with hash 679744213, now seen corresponding path program 1 times [2024-10-10 22:01:57,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:01:57,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325077526] [2024-10-10 22:01:57,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:01:57,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:01:57,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:01:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:57,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:01:57,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325077526] [2024-10-10 22:01:57,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325077526] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:01:57,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300483459] [2024-10-10 22:01:57,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:01:57,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:01:57,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:01:57,816 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:01:57,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-10 22:01:57,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:01:57,885 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-10 22:01:57,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:01:57,988 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 [2024-10-10 22:01:58,031 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 11 [2024-10-10 22:01:58,051 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 11 [2024-10-10 22:01:58,070 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 11 [2024-10-10 22:01:58,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-10 22:01:58,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:58,189 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:01:58,279 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 [2024-10-10 22:01:58,284 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 14 [2024-10-10 22:01:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:58,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300483459] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:01:58,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:01:58,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 18 [2024-10-10 22:01:58,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015687604] [2024-10-10 22:01:58,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:01:58,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-10 22:01:58,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:01:58,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-10 22:01:58,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-10-10 22:01:58,313 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 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) [2024-10-10 22:01:58,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:01:58,926 INFO L93 Difference]: Finished difference Result 117 states and 158 transitions. [2024-10-10 22:01:58,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-10 22:01:58,926 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 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 18 [2024-10-10 22:01:58,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:01:58,928 INFO L225 Difference]: With dead ends: 117 [2024-10-10 22:01:58,928 INFO L226 Difference]: Without dead ends: 101 [2024-10-10 22:01:58,929 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=293, Invalid=897, Unknown=0, NotChecked=0, Total=1190 [2024-10-10 22:01:58,930 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 332 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-10 22:01:58,930 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 97 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-10 22:01:58,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-10-10 22:01:58,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 40. [2024-10-10 22:01:58,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 39 states have internal predecessors, (57), 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) [2024-10-10 22:01:58,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 57 transitions. [2024-10-10 22:01:58,940 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 57 transitions. Word has length 18 [2024-10-10 22:01:58,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:01:58,940 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 57 transitions. [2024-10-10 22:01:58,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 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) [2024-10-10 22:01:58,941 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 57 transitions. [2024-10-10 22:01:58,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-10 22:01:58,941 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:01:58,941 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:01:58,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-10 22:01:59,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:01:59,143 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:01:59,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:01:59,143 INFO L85 PathProgramCache]: Analyzing trace with hash 937909651, now seen corresponding path program 1 times [2024-10-10 22:01:59,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:01:59,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124319192] [2024-10-10 22:01:59,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:01:59,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:01:59,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:01:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:59,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:01:59,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124319192] [2024-10-10 22:01:59,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124319192] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:01:59,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:01:59,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-10 22:01:59,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696890851] [2024-10-10 22:01:59,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:01:59,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-10 22:01:59,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:01:59,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-10 22:01:59,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-10 22:01:59,217 INFO L87 Difference]: Start difference. First operand 40 states and 57 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2024-10-10 22:01:59,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:01:59,267 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2024-10-10 22:01:59,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-10 22:01:59,268 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 18 [2024-10-10 22:01:59,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:01:59,268 INFO L225 Difference]: With dead ends: 65 [2024-10-10 22:01:59,268 INFO L226 Difference]: Without dead ends: 49 [2024-10-10 22:01:59,269 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-10 22:01:59,271 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 38 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:01:59,271 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 39 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:01:59,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-10 22:01:59,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2024-10-10 22:01:59,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 39 states have internal predecessors, (55), 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) [2024-10-10 22:01:59,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 55 transitions. [2024-10-10 22:01:59,283 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 55 transitions. Word has length 18 [2024-10-10 22:01:59,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:01:59,283 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 55 transitions. [2024-10-10 22:01:59,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2024-10-10 22:01:59,283 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 55 transitions. [2024-10-10 22:01:59,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-10 22:01:59,284 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:01:59,286 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:01:59,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-10 22:01:59,287 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:01:59,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:01:59,287 INFO L85 PathProgramCache]: Analyzing trace with hash 544882641, now seen corresponding path program 1 times [2024-10-10 22:01:59,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:01:59,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65234634] [2024-10-10 22:01:59,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:01:59,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:01:59,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:01:59,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:59,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:01:59,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65234634] [2024-10-10 22:01:59,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65234634] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:01:59,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821719947] [2024-10-10 22:01:59,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:01:59,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:01:59,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:01:59,614 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:01:59,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-10 22:01:59,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:01:59,687 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-10 22:01:59,692 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:01:59,716 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 [2024-10-10 22:01:59,732 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 11 [2024-10-10 22:01:59,751 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 11 [2024-10-10 22:01:59,766 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 11 [2024-10-10 22:01:59,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:59,825 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:01:59,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-10 22:01:59,897 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 14 treesize of output 12 [2024-10-10 22:01:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:59,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821719947] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:01:59,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:01:59,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 14 [2024-10-10 22:01:59,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830726575] [2024-10-10 22:01:59,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:01:59,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-10 22:01:59,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:01:59,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-10 22:01:59,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-10-10 22:01:59,911 INFO L87 Difference]: Start difference. First operand 40 states and 55 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 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) [2024-10-10 22:02:00,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:02:00,228 INFO L93 Difference]: Finished difference Result 90 states and 119 transitions. [2024-10-10 22:02:00,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-10 22:02:00,228 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 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 18 [2024-10-10 22:02:00,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:02:00,230 INFO L225 Difference]: With dead ends: 90 [2024-10-10 22:02:00,230 INFO L226 Difference]: Without dead ends: 88 [2024-10-10 22:02:00,231 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2024-10-10 22:02:00,231 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 109 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-10 22:02:00,232 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 97 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-10 22:02:00,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-10-10 22:02:00,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 49. [2024-10-10 22:02:00,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 48 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) [2024-10-10 22:02:00,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2024-10-10 22:02:00,245 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 68 transitions. Word has length 18 [2024-10-10 22:02:00,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:02:00,245 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 68 transitions. [2024-10-10 22:02:00,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 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) [2024-10-10 22:02:00,245 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 68 transitions. [2024-10-10 22:02:00,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-10 22:02:00,246 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:02:00,246 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] [2024-10-10 22:02:00,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-10 22:02:00,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:00,447 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:02:00,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:02:00,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1274762309, now seen corresponding path program 1 times [2024-10-10 22:02:00,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:02:00,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713730546] [2024-10-10 22:02:00,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:00,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:02:00,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:00,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:00,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:00,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713730546] [2024-10-10 22:02:00,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713730546] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:02:00,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269964712] [2024-10-10 22:02:00,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:00,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:00,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:02:00,833 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:02:00,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-10 22:02:00,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:00,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-10 22:02:00,905 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:02:01,003 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 [2024-10-10 22:02:01,032 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 11 [2024-10-10 22:02:01,049 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 11 [2024-10-10 22:02:01,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-10 22:02:01,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:01,200 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:02:01,299 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 [2024-10-10 22:02:01,305 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 [2024-10-10 22:02:01,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:01,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269964712] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:02:01,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:02:01,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2024-10-10 22:02:01,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083733652] [2024-10-10 22:02:01,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:02:01,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-10 22:02:01,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:02:01,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-10 22:02:01,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2024-10-10 22:02:01,393 INFO L87 Difference]: Start difference. First operand 49 states and 68 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 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) [2024-10-10 22:02:02,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:02:02,426 INFO L93 Difference]: Finished difference Result 175 states and 231 transitions. [2024-10-10 22:02:02,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-10 22:02:02,426 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 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 23 [2024-10-10 22:02:02,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:02:02,427 INFO L225 Difference]: With dead ends: 175 [2024-10-10 22:02:02,427 INFO L226 Difference]: Without dead ends: 143 [2024-10-10 22:02:02,430 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=487, Invalid=1865, Unknown=0, NotChecked=0, Total=2352 [2024-10-10 22:02:02,431 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 420 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-10 22:02:02,431 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 178 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-10 22:02:02,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-10-10 22:02:02,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 67. [2024-10-10 22:02:02,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.3333333333333333) internal successors, (88), 66 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) [2024-10-10 22:02:02,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2024-10-10 22:02:02,441 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 23 [2024-10-10 22:02:02,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:02:02,441 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2024-10-10 22:02:02,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 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) [2024-10-10 22:02:02,441 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2024-10-10 22:02:02,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-10 22:02:02,442 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:02:02,442 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] [2024-10-10 22:02:02,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-10 22:02:02,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:02,643 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:02:02,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:02:02,644 INFO L85 PathProgramCache]: Analyzing trace with hash -869074947, now seen corresponding path program 1 times [2024-10-10 22:02:02,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:02:02,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742773587] [2024-10-10 22:02:02,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:02,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:02:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:02,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:02,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742773587] [2024-10-10 22:02:02,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742773587] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:02:02,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135656825] [2024-10-10 22:02:02,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:02,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:02,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:02:02,932 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:02:02,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-10 22:02:02,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:02,994 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-10 22:02:02,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:02:03,046 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 [2024-10-10 22:02:03,072 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 11 [2024-10-10 22:02:03,106 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 11 [2024-10-10 22:02:03,117 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 11 [2024-10-10 22:02:03,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-10 22:02:03,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-10 22:02:03,215 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:02:03,284 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 [2024-10-10 22:02:03,289 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 [2024-10-10 22:02:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-10 22:02:03,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135656825] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:02:03,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:02:03,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 22 [2024-10-10 22:02:03,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825126932] [2024-10-10 22:02:03,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:02:03,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-10 22:02:03,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:02:03,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-10 22:02:03,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2024-10-10 22:02:03,335 INFO L87 Difference]: Start difference. First operand 67 states and 88 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 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) [2024-10-10 22:02:04,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:02:04,246 INFO L93 Difference]: Finished difference Result 181 states and 226 transitions. [2024-10-10 22:02:04,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-10 22:02:04,246 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 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 23 [2024-10-10 22:02:04,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:02:04,247 INFO L225 Difference]: With dead ends: 181 [2024-10-10 22:02:04,248 INFO L226 Difference]: Without dead ends: 172 [2024-10-10 22:02:04,250 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=496, Invalid=1856, Unknown=0, NotChecked=0, Total=2352 [2024-10-10 22:02:04,251 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 239 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-10 22:02:04,251 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 285 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-10 22:02:04,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-10-10 22:02:04,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 93. [2024-10-10 22:02:04,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.3369565217391304) internal successors, (123), 92 states have internal predecessors, (123), 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) [2024-10-10 22:02:04,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 123 transitions. [2024-10-10 22:02:04,263 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 123 transitions. Word has length 23 [2024-10-10 22:02:04,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:02:04,264 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 123 transitions. [2024-10-10 22:02:04,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 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) [2024-10-10 22:02:04,264 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 123 transitions. [2024-10-10 22:02:04,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-10 22:02:04,265 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:02:04,265 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:02:04,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-10 22:02:04,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-10 22:02:04,465 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:02:04,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:02:04,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1802153284, now seen corresponding path program 1 times [2024-10-10 22:02:04,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:02:04,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820322858] [2024-10-10 22:02:04,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:04,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:02:04,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:04,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:04,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:04,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820322858] [2024-10-10 22:02:04,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820322858] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:02:04,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:02:04,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-10 22:02:04,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848535380] [2024-10-10 22:02:04,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:02:04,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 22:02:04,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:02:04,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 22:02:04,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-10 22:02:04,498 INFO L87 Difference]: Start difference. First operand 93 states and 123 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2024-10-10 22:02:04,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:02:04,531 INFO L93 Difference]: Finished difference Result 121 states and 153 transitions. [2024-10-10 22:02:04,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 22:02:04,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 24 [2024-10-10 22:02:04,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:02:04,533 INFO L225 Difference]: With dead ends: 121 [2024-10-10 22:02:04,533 INFO L226 Difference]: Without dead ends: 96 [2024-10-10 22:02:04,534 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-10 22:02:04,534 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:02:04,535 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 32 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:02:04,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-10-10 22:02:04,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 82. [2024-10-10 22:02:04,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.3209876543209877) internal successors, (107), 81 states have internal predecessors, (107), 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) [2024-10-10 22:02:04,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 107 transitions. [2024-10-10 22:02:04,549 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 107 transitions. Word has length 24 [2024-10-10 22:02:04,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:02:04,549 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 107 transitions. [2024-10-10 22:02:04,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2024-10-10 22:02:04,550 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 107 transitions. [2024-10-10 22:02:04,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-10 22:02:04,550 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:02:04,551 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] [2024-10-10 22:02:04,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-10 22:02:04,551 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:02:04,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:02:04,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1100853909, now seen corresponding path program 2 times [2024-10-10 22:02:04,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:02:04,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545729053] [2024-10-10 22:02:04,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:04,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:02:04,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:04,789 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:04,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:04,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545729053] [2024-10-10 22:02:04,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545729053] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:02:04,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127132886] [2024-10-10 22:02:04,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:02:04,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:04,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:02:04,792 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:02:04,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-10 22:02:04,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:02:04,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:02:04,862 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-10 22:02:04,863 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:02:04,905 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 [2024-10-10 22:02:04,932 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 11 [2024-10-10 22:02:05,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-10 22:02:05,091 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:05,091 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:02:05,178 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 [2024-10-10 22:02:05,180 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 18 treesize of output 14 [2024-10-10 22:02:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:05,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127132886] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:02:05,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:02:05,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 21 [2024-10-10 22:02:05,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798355054] [2024-10-10 22:02:05,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:02:05,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-10 22:02:05,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:02:05,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-10 22:02:05,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-10-10 22:02:05,202 INFO L87 Difference]: Start difference. First operand 82 states and 107 transitions. Second operand has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 21 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) [2024-10-10 22:02:06,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:02:06,093 INFO L93 Difference]: Finished difference Result 184 states and 236 transitions. [2024-10-10 22:02:06,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-10 22:02:06,094 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 21 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) Word has length 28 [2024-10-10 22:02:06,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:02:06,094 INFO L225 Difference]: With dead ends: 184 [2024-10-10 22:02:06,094 INFO L226 Difference]: Without dead ends: 175 [2024-10-10 22:02:06,095 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=404, Invalid=1576, Unknown=0, NotChecked=0, Total=1980 [2024-10-10 22:02:06,096 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 155 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-10 22:02:06,097 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 131 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-10 22:02:06,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-10-10 22:02:06,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 88. [2024-10-10 22:02:06,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 87 states have internal predecessors, (113), 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) [2024-10-10 22:02:06,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 113 transitions. [2024-10-10 22:02:06,107 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 113 transitions. Word has length 28 [2024-10-10 22:02:06,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:02:06,107 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 113 transitions. [2024-10-10 22:02:06,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 21 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) [2024-10-10 22:02:06,108 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 113 transitions. [2024-10-10 22:02:06,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-10 22:02:06,109 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:02:06,109 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] [2024-10-10 22:02:06,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-10 22:02:06,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-10 22:02:06,310 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:02:06,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:02:06,310 INFO L85 PathProgramCache]: Analyzing trace with hash 283205459, now seen corresponding path program 1 times [2024-10-10 22:02:06,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:02:06,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88435642] [2024-10-10 22:02:06,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:06,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:02:06,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:06,542 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:06,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:06,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88435642] [2024-10-10 22:02:06,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88435642] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:02:06,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803633133] [2024-10-10 22:02:06,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:06,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:06,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:02:06,545 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:02:06,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-10 22:02:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:06,613 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-10 22:02:06,615 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:02:06,653 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 [2024-10-10 22:02:06,674 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 11 [2024-10-10 22:02:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:06,841 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:02:06,923 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 [2024-10-10 22:02:06,926 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 [2024-10-10 22:02:06,931 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:06,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803633133] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:02:06,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:02:06,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 11] total 22 [2024-10-10 22:02:06,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982478299] [2024-10-10 22:02:06,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:02:06,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-10 22:02:06,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:02:06,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-10 22:02:06,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2024-10-10 22:02:06,933 INFO L87 Difference]: Start difference. First operand 88 states and 113 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 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) [2024-10-10 22:02:07,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:02:07,598 INFO L93 Difference]: Finished difference Result 279 states and 374 transitions. [2024-10-10 22:02:07,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-10 22:02:07,599 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 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 28 [2024-10-10 22:02:07,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:02:07,600 INFO L225 Difference]: With dead ends: 279 [2024-10-10 22:02:07,600 INFO L226 Difference]: Without dead ends: 277 [2024-10-10 22:02:07,601 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=312, Invalid=1410, Unknown=0, NotChecked=0, Total=1722 [2024-10-10 22:02:07,601 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 93 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-10 22:02:07,602 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 103 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-10 22:02:07,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2024-10-10 22:02:07,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 122. [2024-10-10 22:02:07,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.2892561983471074) internal successors, (156), 121 states have internal predecessors, (156), 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) [2024-10-10 22:02:07,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 156 transitions. [2024-10-10 22:02:07,618 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 156 transitions. Word has length 28 [2024-10-10 22:02:07,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:02:07,619 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 156 transitions. [2024-10-10 22:02:07,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 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) [2024-10-10 22:02:07,619 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 156 transitions. [2024-10-10 22:02:07,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-10 22:02:07,620 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:02:07,620 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:02:07,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-10 22:02:07,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-10 22:02:07,821 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:02:07,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:02:07,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1487407854, now seen corresponding path program 1 times [2024-10-10 22:02:07,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:02:07,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295004486] [2024-10-10 22:02:07,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:07,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:02:07,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-10 22:02:07,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:07,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295004486] [2024-10-10 22:02:07,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295004486] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:02:07,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:02:07,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-10 22:02:07,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983245230] [2024-10-10 22:02:07,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:02:07,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 22:02:07,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:02:07,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 22:02:07,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-10 22:02:07,878 INFO L87 Difference]: Start difference. First operand 122 states and 156 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2024-10-10 22:02:07,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:02:07,910 INFO L93 Difference]: Finished difference Result 166 states and 209 transitions. [2024-10-10 22:02:07,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 22:02:07,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 29 [2024-10-10 22:02:07,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:02:07,911 INFO L225 Difference]: With dead ends: 166 [2024-10-10 22:02:07,911 INFO L226 Difference]: Without dead ends: 123 [2024-10-10 22:02:07,912 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-10 22:02:07,912 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 13 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:02:07,912 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 32 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:02:07,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-10-10 22:02:07,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 109. [2024-10-10 22:02:07,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.25) internal successors, (135), 108 states have internal predecessors, (135), 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) [2024-10-10 22:02:07,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 135 transitions. [2024-10-10 22:02:07,925 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 135 transitions. Word has length 29 [2024-10-10 22:02:07,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:02:07,925 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 135 transitions. [2024-10-10 22:02:07,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2024-10-10 22:02:07,926 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 135 transitions. [2024-10-10 22:02:07,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-10 22:02:07,927 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:02:07,927 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:02:07,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-10 22:02:07,927 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:02:07,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:02:07,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1567636370, now seen corresponding path program 2 times [2024-10-10 22:02:07,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:02:07,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322359165] [2024-10-10 22:02:07,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:07,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:02:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:07,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-10 22:02:07,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:07,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322359165] [2024-10-10 22:02:07,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322359165] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:02:07,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:02:07,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-10 22:02:07,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868433384] [2024-10-10 22:02:07,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:02:07,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 22:02:07,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:02:07,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 22:02:07,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-10 22:02:07,962 INFO L87 Difference]: Start difference. First operand 109 states and 135 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2024-10-10 22:02:07,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:02:07,993 INFO L93 Difference]: Finished difference Result 137 states and 167 transitions. [2024-10-10 22:02:07,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 22:02:07,993 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 29 [2024-10-10 22:02:07,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:02:07,995 INFO L225 Difference]: With dead ends: 137 [2024-10-10 22:02:07,995 INFO L226 Difference]: Without dead ends: 107 [2024-10-10 22:02:07,996 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-10 22:02:07,996 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:02:07,997 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 46 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:02:07,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-10-10 22:02:08,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2024-10-10 22:02:08,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.2391304347826086) internal successors, (114), 92 states have internal predecessors, (114), 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) [2024-10-10 22:02:08,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2024-10-10 22:02:08,008 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 29 [2024-10-10 22:02:08,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:02:08,008 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2024-10-10 22:02:08,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2024-10-10 22:02:08,008 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2024-10-10 22:02:08,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-10 22:02:08,012 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:02:08,012 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:02:08,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-10 22:02:08,013 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:02:08,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:02:08,013 INFO L85 PathProgramCache]: Analyzing trace with hash -54991877, now seen corresponding path program 3 times [2024-10-10 22:02:08,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:02:08,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044870287] [2024-10-10 22:02:08,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:08,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:02:08,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:08,282 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:08,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:08,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044870287] [2024-10-10 22:02:08,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044870287] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:02:08,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481187451] [2024-10-10 22:02:08,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:02:08,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:08,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:02:08,288 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:02:08,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-10 22:02:08,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-10 22:02:08,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:02:08,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-10 22:02:08,362 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:02:08,379 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 [2024-10-10 22:02:08,498 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:08,498 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:02:08,584 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 [2024-10-10 22:02:08,586 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 [2024-10-10 22:02:08,592 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:08,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481187451] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:02:08,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:02:08,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2024-10-10 22:02:08,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002556416] [2024-10-10 22:02:08,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:02:08,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-10 22:02:08,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:02:08,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-10 22:02:08,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2024-10-10 22:02:08,594 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 22 states have internal predecessors, (82), 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) [2024-10-10 22:02:09,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:02:09,477 INFO L93 Difference]: Finished difference Result 297 states and 365 transitions. [2024-10-10 22:02:09,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-10-10 22:02:09,477 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 22 states have internal predecessors, (82), 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 33 [2024-10-10 22:02:09,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:02:09,480 INFO L225 Difference]: With dead ends: 297 [2024-10-10 22:02:09,480 INFO L226 Difference]: Without dead ends: 295 [2024-10-10 22:02:09,482 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=359, Invalid=1897, Unknown=0, NotChecked=0, Total=2256 [2024-10-10 22:02:09,482 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 75 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-10 22:02:09,482 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 145 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 997 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-10 22:02:09,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2024-10-10 22:02:09,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 222. [2024-10-10 22:02:09,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.2714932126696832) internal successors, (281), 221 states have internal predecessors, (281), 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) [2024-10-10 22:02:09,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 281 transitions. [2024-10-10 22:02:09,507 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 281 transitions. Word has length 33 [2024-10-10 22:02:09,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:02:09,507 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 281 transitions. [2024-10-10 22:02:09,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 22 states have internal predecessors, (82), 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) [2024-10-10 22:02:09,508 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 281 transitions. [2024-10-10 22:02:09,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-10 22:02:09,508 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:02:09,508 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:02:09,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-10 22:02:09,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:09,713 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:02:09,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:02:09,713 INFO L85 PathProgramCache]: Analyzing trace with hash 79021629, now seen corresponding path program 1 times [2024-10-10 22:02:09,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:02:09,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188935074] [2024-10-10 22:02:09,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:09,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:02:09,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:09,997 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:09,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:09,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188935074] [2024-10-10 22:02:09,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188935074] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:02:09,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694972286] [2024-10-10 22:02:09,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:09,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:09,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:02:10,000 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:02:10,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-10 22:02:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:10,081 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-10 22:02:10,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:02:10,126 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 [2024-10-10 22:02:10,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-10 22:02:10,289 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:10,289 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:02:10,392 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 [2024-10-10 22:02:10,394 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 18 treesize of output 14 [2024-10-10 22:02:10,412 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:10,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694972286] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:02:10,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:02:10,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2024-10-10 22:02:10,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733504803] [2024-10-10 22:02:10,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:02:10,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-10 22:02:10,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:02:10,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-10 22:02:10,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2024-10-10 22:02:10,417 INFO L87 Difference]: Start difference. First operand 222 states and 281 transitions. Second operand has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 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) [2024-10-10 22:02:11,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:02:11,257 INFO L93 Difference]: Finished difference Result 491 states and 613 transitions. [2024-10-10 22:02:11,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-10-10 22:02:11,257 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 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 33 [2024-10-10 22:02:11,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:02:11,259 INFO L225 Difference]: With dead ends: 491 [2024-10-10 22:02:11,259 INFO L226 Difference]: Without dead ends: 414 [2024-10-10 22:02:11,260 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=487, Invalid=2063, Unknown=0, NotChecked=0, Total=2550 [2024-10-10 22:02:11,261 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 151 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-10 22:02:11,261 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 203 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-10 22:02:11,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2024-10-10 22:02:11,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 297. [2024-10-10 22:02:11,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.239864864864865) internal successors, (367), 296 states have internal predecessors, (367), 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) [2024-10-10 22:02:11,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 367 transitions. [2024-10-10 22:02:11,293 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 367 transitions. Word has length 33 [2024-10-10 22:02:11,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:02:11,293 INFO L471 AbstractCegarLoop]: Abstraction has 297 states and 367 transitions. [2024-10-10 22:02:11,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 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) [2024-10-10 22:02:11,293 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 367 transitions. [2024-10-10 22:02:11,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-10 22:02:11,294 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:02:11,294 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:02:11,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-10 22:02:11,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-10 22:02:11,495 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:02:11,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:02:11,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1174577749, now seen corresponding path program 4 times [2024-10-10 22:02:11,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:02:11,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240786314] [2024-10-10 22:02:11,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:11,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:02:11,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:11,810 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:11,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:11,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240786314] [2024-10-10 22:02:11,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240786314] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:02:11,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147743952] [2024-10-10 22:02:11,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-10 22:02:11,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:11,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:02:11,813 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:02:11,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-10 22:02:11,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-10 22:02:11,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:02:11,881 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-10 22:02:11,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:02:12,286 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:12,286 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:02:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:12,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147743952] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:02:12,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:02:12,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2024-10-10 22:02:12,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18646290] [2024-10-10 22:02:12,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:02:12,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-10 22:02:12,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:02:12,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-10 22:02:12,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2024-10-10 22:02:12,478 INFO L87 Difference]: Start difference. First operand 297 states and 367 transitions. Second operand has 30 states, 30 states have (on average 3.433333333333333) internal successors, (103), 30 states have internal predecessors, (103), 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) [2024-10-10 22:02:12,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:02:12,819 INFO L93 Difference]: Finished difference Result 447 states and 526 transitions. [2024-10-10 22:02:12,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-10 22:02:12,819 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.433333333333333) internal successors, (103), 30 states have internal predecessors, (103), 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 38 [2024-10-10 22:02:12,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:02:12,821 INFO L225 Difference]: With dead ends: 447 [2024-10-10 22:02:12,822 INFO L226 Difference]: Without dead ends: 350 [2024-10-10 22:02:12,824 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=1238, Unknown=0, NotChecked=0, Total=1640 [2024-10-10 22:02:12,824 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 278 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:02:12,824 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 98 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:02:12,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2024-10-10 22:02:12,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 303. [2024-10-10 22:02:12,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.218543046357616) internal successors, (368), 302 states have internal predecessors, (368), 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) [2024-10-10 22:02:12,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 368 transitions. [2024-10-10 22:02:12,861 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 368 transitions. Word has length 38 [2024-10-10 22:02:12,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:02:12,862 INFO L471 AbstractCegarLoop]: Abstraction has 303 states and 368 transitions. [2024-10-10 22:02:12,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.433333333333333) internal successors, (103), 30 states have internal predecessors, (103), 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) [2024-10-10 22:02:12,862 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 368 transitions. [2024-10-10 22:02:12,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-10 22:02:12,864 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:02:12,864 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:02:12,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-10 22:02:13,064 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:13,065 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:02:13,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:02:13,065 INFO L85 PathProgramCache]: Analyzing trace with hash -629625475, now seen corresponding path program 1 times [2024-10-10 22:02:13,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:02:13,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386723464] [2024-10-10 22:02:13,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:13,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:02:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-10 22:02:13,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:13,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386723464] [2024-10-10 22:02:13,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386723464] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:02:13,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:02:13,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-10 22:02:13,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424534646] [2024-10-10 22:02:13,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:02:13,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 22:02:13,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:02:13,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 22:02:13,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-10 22:02:13,109 INFO L87 Difference]: Start difference. First operand 303 states and 368 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2024-10-10 22:02:13,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:02:13,170 INFO L93 Difference]: Finished difference Result 409 states and 492 transitions. [2024-10-10 22:02:13,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 22:02:13,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 40 [2024-10-10 22:02:13,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:02:13,171 INFO L225 Difference]: With dead ends: 409 [2024-10-10 22:02:13,172 INFO L226 Difference]: Without dead ends: 279 [2024-10-10 22:02:13,172 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-10 22:02:13,173 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 13 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:02:13,173 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 45 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:02:13,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2024-10-10 22:02:13,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 250. [2024-10-10 22:02:13,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.1887550200803212) internal successors, (296), 249 states have internal predecessors, (296), 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) [2024-10-10 22:02:13,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 296 transitions. [2024-10-10 22:02:13,202 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 296 transitions. Word has length 40 [2024-10-10 22:02:13,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:02:13,203 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 296 transitions. [2024-10-10 22:02:13,203 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2024-10-10 22:02:13,203 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 296 transitions. [2024-10-10 22:02:13,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-10 22:02:13,204 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:02:13,204 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] [2024-10-10 22:02:13,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-10-10 22:02:13,204 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:02:13,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:02:13,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1716361334, now seen corresponding path program 5 times [2024-10-10 22:02:13,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:02:13,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678466296] [2024-10-10 22:02:13,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:13,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:02:13,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:13,649 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:13,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:13,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678466296] [2024-10-10 22:02:13,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678466296] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:02:13,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682702490] [2024-10-10 22:02:13,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-10 22:02:13,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:13,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:02:13,652 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:02:13,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-10 22:02:13,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-10-10 22:02:13,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:02:13,766 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-10 22:02:13,770 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:02:13,820 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 [2024-10-10 22:02:13,875 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 35 treesize of output 13 [2024-10-10 22:02:13,884 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 35 treesize of output 13 [2024-10-10 22:02:13,895 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 35 treesize of output 13 [2024-10-10 22:02:13,921 INFO L349 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2024-10-10 22:02:13,921 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 1 case distinctions, treesize of input 35 treesize of output 13 [2024-10-10 22:02:14,105 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 7 [2024-10-10 22:02:14,129 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 23 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-10 22:02:14,130 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:02:14,637 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 27 treesize of output 25 [2024-10-10 22:02:14,641 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 118 treesize of output 110 [2024-10-10 22:02:14,731 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 23 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-10 22:02:14,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682702490] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:02:14,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:02:14,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 12] total 33 [2024-10-10 22:02:14,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482922814] [2024-10-10 22:02:14,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:02:14,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-10 22:02:14,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:02:14,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-10 22:02:14,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2024-10-10 22:02:14,733 INFO L87 Difference]: Start difference. First operand 250 states and 296 transitions. Second operand has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 33 states have internal predecessors, (117), 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) [2024-10-10 22:02:17,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:02:17,050 INFO L93 Difference]: Finished difference Result 418 states and 485 transitions. [2024-10-10 22:02:17,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-10-10 22:02:17,051 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 33 states have internal predecessors, (117), 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 44 [2024-10-10 22:02:17,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:02:17,052 INFO L225 Difference]: With dead ends: 418 [2024-10-10 22:02:17,052 INFO L226 Difference]: Without dead ends: 409 [2024-10-10 22:02:17,054 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1755 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=976, Invalid=6334, Unknown=0, NotChecked=0, Total=7310 [2024-10-10 22:02:17,055 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 376 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 1834 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 1999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 1834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:02:17,055 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 404 Invalid, 1999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 1834 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-10 22:02:17,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2024-10-10 22:02:17,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 296. [2024-10-10 22:02:17,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 1.1627118644067798) internal successors, (343), 295 states have internal predecessors, (343), 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) [2024-10-10 22:02:17,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 343 transitions. [2024-10-10 22:02:17,092 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 343 transitions. Word has length 44 [2024-10-10 22:02:17,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:02:17,092 INFO L471 AbstractCegarLoop]: Abstraction has 296 states and 343 transitions. [2024-10-10 22:02:17,092 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 33 states have internal predecessors, (117), 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) [2024-10-10 22:02:17,092 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 343 transitions. [2024-10-10 22:02:17,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-10 22:02:17,093 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:02:17,093 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:02:17,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-10 22:02:17,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-10 22:02:17,298 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:02:17,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:02:17,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1408037496, now seen corresponding path program 2 times [2024-10-10 22:02:17,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:02:17,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397074032] [2024-10-10 22:02:17,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:17,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:02:17,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:17,743 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:17,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:17,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397074032] [2024-10-10 22:02:17,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397074032] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:02:17,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663852178] [2024-10-10 22:02:17,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:02:17,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:17,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:02:17,746 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:02:17,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-10 22:02:17,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:02:17,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:02:17,843 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-10 22:02:17,847 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:02:17,945 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 [2024-10-10 22:02:17,974 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 11 [2024-10-10 22:02:17,983 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 11 [2024-10-10 22:02:17,992 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 11 [2024-10-10 22:02:18,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-10 22:02:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:18,214 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:02:18,389 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 [2024-10-10 22:02:18,392 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 [2024-10-10 22:02:18,466 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:18,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663852178] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:02:18,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:02:18,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 33 [2024-10-10 22:02:18,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068674347] [2024-10-10 22:02:18,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:02:18,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-10 22:02:18,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:02:18,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-10 22:02:18,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2024-10-10 22:02:18,469 INFO L87 Difference]: Start difference. First operand 296 states and 343 transitions. Second operand has 33 states, 33 states have (on average 3.696969696969697) internal successors, (122), 33 states have internal predecessors, (122), 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) [2024-10-10 22:02:20,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:02:20,008 INFO L93 Difference]: Finished difference Result 501 states and 577 transitions. [2024-10-10 22:02:20,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-10-10 22:02:20,009 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.696969696969697) internal successors, (122), 33 states have internal predecessors, (122), 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 44 [2024-10-10 22:02:20,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:02:20,011 INFO L225 Difference]: With dead ends: 501 [2024-10-10 22:02:20,011 INFO L226 Difference]: Without dead ends: 492 [2024-10-10 22:02:20,012 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1343 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=856, Invalid=5150, Unknown=0, NotChecked=0, Total=6006 [2024-10-10 22:02:20,013 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 302 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 1358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-10 22:02:20,013 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 268 Invalid, 1358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 1104 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-10 22:02:20,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2024-10-10 22:02:20,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 326. [2024-10-10 22:02:20,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.156923076923077) internal successors, (376), 325 states have internal predecessors, (376), 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) [2024-10-10 22:02:20,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 376 transitions. [2024-10-10 22:02:20,055 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 376 transitions. Word has length 44 [2024-10-10 22:02:20,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:02:20,055 INFO L471 AbstractCegarLoop]: Abstraction has 326 states and 376 transitions. [2024-10-10 22:02:20,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.696969696969697) internal successors, (122), 33 states have internal predecessors, (122), 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) [2024-10-10 22:02:20,055 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 376 transitions. [2024-10-10 22:02:20,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-10 22:02:20,056 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:02:20,056 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:02:20,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-10 22:02:20,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:20,257 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:02:20,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:02:20,257 INFO L85 PathProgramCache]: Analyzing trace with hash 2132330116, now seen corresponding path program 1 times [2024-10-10 22:02:20,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:02:20,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649703927] [2024-10-10 22:02:20,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:20,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:02:20,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:20,630 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:20,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:20,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649703927] [2024-10-10 22:02:20,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649703927] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:02:20,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119800159] [2024-10-10 22:02:20,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:20,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:20,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:02:20,632 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:02:20,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-10 22:02:20,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:20,711 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-10 22:02:20,713 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:02:20,838 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 [2024-10-10 22:02:20,863 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 11 [2024-10-10 22:02:20,879 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 11 [2024-10-10 22:02:20,888 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 11 [2024-10-10 22:02:21,106 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:21,106 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:02:21,186 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 [2024-10-10 22:02:21,188 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 [2024-10-10 22:02:21,198 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:21,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119800159] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:02:21,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:02:21,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 24 [2024-10-10 22:02:21,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173646267] [2024-10-10 22:02:21,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:02:21,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-10 22:02:21,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:02:21,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-10 22:02:21,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2024-10-10 22:02:21,200 INFO L87 Difference]: Start difference. First operand 326 states and 376 transitions. Second operand has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 24 states have internal predecessors, (97), 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) [2024-10-10 22:02:22,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:02:22,408 INFO L93 Difference]: Finished difference Result 510 states and 589 transitions. [2024-10-10 22:02:22,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-10-10 22:02:22,409 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 24 states have internal predecessors, (97), 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 44 [2024-10-10 22:02:22,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:02:22,411 INFO L225 Difference]: With dead ends: 510 [2024-10-10 22:02:22,411 INFO L226 Difference]: Without dead ends: 508 [2024-10-10 22:02:22,412 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1422 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=625, Invalid=4067, Unknown=0, NotChecked=0, Total=4692 [2024-10-10 22:02:22,413 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 104 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 1610 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 1810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-10 22:02:22,413 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 248 Invalid, 1810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1610 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-10 22:02:22,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2024-10-10 22:02:22,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 338. [2024-10-10 22:02:22,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 1.1572700296735905) internal successors, (390), 337 states have internal predecessors, (390), 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) [2024-10-10 22:02:22,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 390 transitions. [2024-10-10 22:02:22,462 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 390 transitions. Word has length 44 [2024-10-10 22:02:22,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:02:22,462 INFO L471 AbstractCegarLoop]: Abstraction has 338 states and 390 transitions. [2024-10-10 22:02:22,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 24 states have internal predecessors, (97), 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) [2024-10-10 22:02:22,462 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 390 transitions. [2024-10-10 22:02:22,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-10 22:02:22,463 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:02:22,463 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:02:22,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-10 22:02:22,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:22,664 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:02:22,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:02:22,664 INFO L85 PathProgramCache]: Analyzing trace with hash 524522340, now seen corresponding path program 6 times [2024-10-10 22:02:22,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:02:22,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237516056] [2024-10-10 22:02:22,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:22,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:02:22,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:23,119 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:23,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:23,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237516056] [2024-10-10 22:02:23,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237516056] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:02:23,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299884647] [2024-10-10 22:02:23,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-10 22:02:23,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:23,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:02:23,122 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:02:23,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-10 22:02:23,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-10-10 22:02:23,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:02:23,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-10 22:02:23,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:02:23,375 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 [2024-10-10 22:02:23,406 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 29 treesize of output 13 [2024-10-10 22:02:23,437 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:02:23,438 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 47 treesize of output 28 [2024-10-10 22:02:23,798 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:02:23,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 37 treesize of output 13 [2024-10-10 22:02:23,809 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:23,809 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:02:24,004 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 [2024-10-10 22:02:24,007 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 [2024-10-10 22:02:24,090 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:24,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299884647] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:02:24,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:02:24,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 38 [2024-10-10 22:02:24,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712725962] [2024-10-10 22:02:24,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:02:24,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-10 22:02:24,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:02:24,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-10 22:02:24,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1260, Unknown=0, NotChecked=0, Total=1406 [2024-10-10 22:02:24,092 INFO L87 Difference]: Start difference. First operand 338 states and 390 transitions. Second operand has 38 states, 38 states have (on average 3.6052631578947367) internal successors, (137), 38 states have internal predecessors, (137), 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) [2024-10-10 22:02:27,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:02:27,698 INFO L93 Difference]: Finished difference Result 656 states and 762 transitions. [2024-10-10 22:02:27,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2024-10-10 22:02:27,698 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.6052631578947367) internal successors, (137), 38 states have internal predecessors, (137), 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 49 [2024-10-10 22:02:27,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:02:27,700 INFO L225 Difference]: With dead ends: 656 [2024-10-10 22:02:27,700 INFO L226 Difference]: Without dead ends: 647 [2024-10-10 22:02:27,704 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4313 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1785, Invalid=12735, Unknown=0, NotChecked=0, Total=14520 [2024-10-10 22:02:27,704 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 446 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 2425 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 2721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 2425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-10-10 22:02:27,704 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 420 Invalid, 2721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 2425 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-10-10 22:02:27,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2024-10-10 22:02:27,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 397. [2024-10-10 22:02:27,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 1.148989898989899) internal successors, (455), 396 states have internal predecessors, (455), 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) [2024-10-10 22:02:27,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 455 transitions. [2024-10-10 22:02:27,773 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 455 transitions. Word has length 49 [2024-10-10 22:02:27,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:02:27,774 INFO L471 AbstractCegarLoop]: Abstraction has 397 states and 455 transitions. [2024-10-10 22:02:27,774 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.6052631578947367) internal successors, (137), 38 states have internal predecessors, (137), 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) [2024-10-10 22:02:27,774 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 455 transitions. [2024-10-10 22:02:27,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-10 22:02:27,775 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:02:27,775 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:02:27,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-10 22:02:27,976 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:27,976 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:02:27,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:02:27,977 INFO L85 PathProgramCache]: Analyzing trace with hash 972271400, now seen corresponding path program 2 times [2024-10-10 22:02:27,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:02:27,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186871210] [2024-10-10 22:02:27,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:27,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:02:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:28,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:28,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186871210] [2024-10-10 22:02:28,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186871210] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:02:28,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336897111] [2024-10-10 22:02:28,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:02:28,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:28,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:02:28,372 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:02:28,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-10 22:02:28,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:02:28,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:02:28,479 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-10-10 22:02:28,482 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:02:28,549 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 [2024-10-10 22:02:28,585 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 11 [2024-10-10 22:02:28,591 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 11 [2024-10-10 22:02:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:28,851 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:02:28,949 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 [2024-10-10 22:02:28,951 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 [2024-10-10 22:02:28,959 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:28,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336897111] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:02:28,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:02:28,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 15] total 30 [2024-10-10 22:02:28,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264151095] [2024-10-10 22:02:28,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:02:28,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-10 22:02:28,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:02:28,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-10 22:02:28,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2024-10-10 22:02:28,961 INFO L87 Difference]: Start difference. First operand 397 states and 455 transitions. Second operand has 30 states, 30 states have (on average 3.6333333333333333) internal successors, (109), 30 states have internal predecessors, (109), 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) [2024-10-10 22:02:30,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:02:30,775 INFO L93 Difference]: Finished difference Result 645 states and 753 transitions. [2024-10-10 22:02:30,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-10-10 22:02:30,775 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.6333333333333333) internal successors, (109), 30 states have internal predecessors, (109), 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 49 [2024-10-10 22:02:30,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:02:30,777 INFO L225 Difference]: With dead ends: 645 [2024-10-10 22:02:30,777 INFO L226 Difference]: Without dead ends: 643 [2024-10-10 22:02:30,780 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2547 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1018, Invalid=6814, Unknown=0, NotChecked=0, Total=7832 [2024-10-10 22:02:30,782 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 174 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 1676 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 2109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 1676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-10 22:02:30,785 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 245 Invalid, 2109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [433 Valid, 1676 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-10 22:02:30,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2024-10-10 22:02:30,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 402. [2024-10-10 22:02:30,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.1496259351620948) internal successors, (461), 401 states have internal predecessors, (461), 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) [2024-10-10 22:02:30,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 461 transitions. [2024-10-10 22:02:30,846 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 461 transitions. Word has length 49 [2024-10-10 22:02:30,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:02:30,846 INFO L471 AbstractCegarLoop]: Abstraction has 402 states and 461 transitions. [2024-10-10 22:02:30,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.6333333333333333) internal successors, (109), 30 states have internal predecessors, (109), 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) [2024-10-10 22:02:30,846 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 461 transitions. [2024-10-10 22:02:30,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-10 22:02:30,847 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:02:30,847 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:02:30,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-10 22:02:31,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-10-10 22:02:31,048 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:02:31,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:02:31,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1496147330, now seen corresponding path program 1 times [2024-10-10 22:02:31,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:02:31,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978399325] [2024-10-10 22:02:31,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:31,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:02:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-10 22:02:31,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:31,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978399325] [2024-10-10 22:02:31,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978399325] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:02:31,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:02:31,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-10 22:02:31,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946794325] [2024-10-10 22:02:31,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:02:31,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 22:02:31,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:02:31,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 22:02:31,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-10 22:02:31,109 INFO L87 Difference]: Start difference. First operand 402 states and 461 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 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) [2024-10-10 22:02:31,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:02:31,186 INFO L93 Difference]: Finished difference Result 600 states and 687 transitions. [2024-10-10 22:02:31,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 22:02:31,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 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) Word has length 51 [2024-10-10 22:02:31,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:02:31,189 INFO L225 Difference]: With dead ends: 600 [2024-10-10 22:02:31,189 INFO L226 Difference]: Without dead ends: 337 [2024-10-10 22:02:31,189 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-10 22:02:31,190 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 13 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 36 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 [2024-10-10 22:02:31,190 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 36 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:02:31,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2024-10-10 22:02:31,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 258. [2024-10-10 22:02:31,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 1.1089494163424125) internal successors, (285), 257 states have internal predecessors, (285), 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) [2024-10-10 22:02:31,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 285 transitions. [2024-10-10 22:02:31,227 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 285 transitions. Word has length 51 [2024-10-10 22:02:31,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:02:31,228 INFO L471 AbstractCegarLoop]: Abstraction has 258 states and 285 transitions. [2024-10-10 22:02:31,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 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) [2024-10-10 22:02:31,228 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 285 transitions. [2024-10-10 22:02:31,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-10 22:02:31,228 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:02:31,228 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:02:31,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-10-10 22:02:31,229 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:02:31,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:02:31,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1641731704, now seen corresponding path program 3 times [2024-10-10 22:02:31,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:02:31,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544569179] [2024-10-10 22:02:31,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:31,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:02:31,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:31,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:31,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544569179] [2024-10-10 22:02:31,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544569179] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:02:31,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904254461] [2024-10-10 22:02:31,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:02:31,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:31,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:02:31,581 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:02:31,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-10 22:02:31,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-10-10 22:02:31,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:02:31,737 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-10-10 22:02:31,740 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:02:31,749 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 [2024-10-10 22:02:31,772 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 29 treesize of output 13 [2024-10-10 22:02:31,800 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 29 treesize of output 13 [2024-10-10 22:02:31,808 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 29 treesize of output 13 [2024-10-10 22:02:31,814 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 [2024-10-10 22:02:31,840 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:02:31,840 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 [2024-10-10 22:02:32,356 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:02:32,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 37 treesize of output 13 [2024-10-10 22:02:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 12 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:32,364 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:02:32,926 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 49 treesize of output 45 [2024-10-10 22:02:32,930 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:02:32,931 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 224 treesize of output 192 [2024-10-10 22:02:32,939 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 12 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:32,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904254461] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:02:32,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:02:32,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 16] total 40 [2024-10-10 22:02:32,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036147903] [2024-10-10 22:02:32,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:02:32,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-10 22:02:32,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:02:32,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-10 22:02:32,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1364, Unknown=0, NotChecked=0, Total=1560 [2024-10-10 22:02:32,941 INFO L87 Difference]: Start difference. First operand 258 states and 285 transitions. Second operand has 40 states, 40 states have (on average 3.525) internal successors, (141), 40 states have internal predecessors, (141), 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) [2024-10-10 22:02:38,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:02:38,923 INFO L93 Difference]: Finished difference Result 664 states and 736 transitions. [2024-10-10 22:02:38,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2024-10-10 22:02:38,923 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.525) internal successors, (141), 40 states have internal predecessors, (141), 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 54 [2024-10-10 22:02:38,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:02:38,925 INFO L225 Difference]: With dead ends: 664 [2024-10-10 22:02:38,925 INFO L226 Difference]: Without dead ends: 655 [2024-10-10 22:02:38,928 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11741 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2271, Invalid=29949, Unknown=0, NotChecked=0, Total=32220 [2024-10-10 22:02:38,929 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 581 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 3971 mSolverCounterSat, 718 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 4689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 718 IncrementalHoareTripleChecker+Valid, 3971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-10-10 22:02:38,929 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [581 Valid, 419 Invalid, 4689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [718 Valid, 3971 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-10-10 22:02:38,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2024-10-10 22:02:38,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 348. [2024-10-10 22:02:38,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 1.1037463976945245) internal successors, (383), 347 states have internal predecessors, (383), 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) [2024-10-10 22:02:38,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 383 transitions. [2024-10-10 22:02:38,999 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 383 transitions. Word has length 54 [2024-10-10 22:02:38,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:02:38,999 INFO L471 AbstractCegarLoop]: Abstraction has 348 states and 383 transitions. [2024-10-10 22:02:39,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.525) internal successors, (141), 40 states have internal predecessors, (141), 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) [2024-10-10 22:02:39,000 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 383 transitions. [2024-10-10 22:02:39,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-10-10 22:02:39,001 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:02:39,001 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:02:39,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-10 22:02:39,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-10-10 22:02:39,202 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:02:39,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:02:39,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1698886556, now seen corresponding path program 7 times [2024-10-10 22:02:39,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:02:39,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619280301] [2024-10-10 22:02:39,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:39,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:02:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:39,581 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:39,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:39,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619280301] [2024-10-10 22:02:39,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619280301] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:02:39,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460499242] [2024-10-10 22:02:39,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-10 22:02:39,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:39,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:02:39,584 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:02:39,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-10 22:02:39,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:39,698 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-10-10 22:02:39,700 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:02:39,778 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 [2024-10-10 22:02:40,156 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:40,156 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:02:40,263 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 [2024-10-10 22:02:40,264 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 [2024-10-10 22:02:40,274 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:40,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460499242] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:02:40,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:02:40,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 17] total 34 [2024-10-10 22:02:40,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818059436] [2024-10-10 22:02:40,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:02:40,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-10 22:02:40,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:02:40,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-10 22:02:40,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2024-10-10 22:02:40,276 INFO L87 Difference]: Start difference. First operand 348 states and 383 transitions. Second operand has 34 states, 34 states have (on average 3.6470588235294117) internal successors, (124), 34 states have internal predecessors, (124), 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) [2024-10-10 22:02:43,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:02:43,304 INFO L93 Difference]: Finished difference Result 675 states and 748 transitions. [2024-10-10 22:02:43,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2024-10-10 22:02:43,304 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.6470588235294117) internal successors, (124), 34 states have internal predecessors, (124), 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 59 [2024-10-10 22:02:43,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:02:43,307 INFO L225 Difference]: With dead ends: 675 [2024-10-10 22:02:43,307 INFO L226 Difference]: Without dead ends: 673 [2024-10-10 22:02:43,308 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3704 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1222, Invalid=10120, Unknown=0, NotChecked=0, Total=11342 [2024-10-10 22:02:43,309 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 114 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 4741 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 5011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 4741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-10-10 22:02:43,309 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 320 Invalid, 5011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 4741 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-10-10 22:02:43,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2024-10-10 22:02:43,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 348. [2024-10-10 22:02:43,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 1.1037463976945245) internal successors, (383), 347 states have internal predecessors, (383), 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) [2024-10-10 22:02:43,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 383 transitions. [2024-10-10 22:02:43,371 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 383 transitions. Word has length 59 [2024-10-10 22:02:43,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:02:43,372 INFO L471 AbstractCegarLoop]: Abstraction has 348 states and 383 transitions. [2024-10-10 22:02:43,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.6470588235294117) internal successors, (124), 34 states have internal predecessors, (124), 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) [2024-10-10 22:02:43,372 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 383 transitions. [2024-10-10 22:02:43,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-10-10 22:02:43,373 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:02:43,373 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:02:43,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-10 22:02:43,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-10-10 22:02:43,578 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:02:43,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:02:43,578 INFO L85 PathProgramCache]: Analyzing trace with hash 965595050, now seen corresponding path program 2 times [2024-10-10 22:02:43,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:02:43,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995940058] [2024-10-10 22:02:43,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:43,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:02:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:43,968 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 14 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:43,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:43,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995940058] [2024-10-10 22:02:43,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995940058] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:02:43,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441810685] [2024-10-10 22:02:43,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:02:43,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:43,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:02:43,972 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:02:43,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-10 22:02:44,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:02:44,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:02:44,076 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-10 22:02:44,078 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:02:44,167 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 [2024-10-10 22:02:44,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-10 22:02:44,493 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 14 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:44,493 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:02:44,756 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 [2024-10-10 22:02:44,758 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 [2024-10-10 22:02:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 14 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:44,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441810685] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:02:44,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:02:44,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 15] total 42 [2024-10-10 22:02:44,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397703966] [2024-10-10 22:02:44,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:02:44,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-10-10 22:02:44,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:02:44,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-10-10 22:02:44,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1573, Unknown=0, NotChecked=0, Total=1722 [2024-10-10 22:02:44,848 INFO L87 Difference]: Start difference. First operand 348 states and 383 transitions. Second operand has 42 states, 42 states have (on average 3.9761904761904763) internal successors, (167), 42 states have internal predecessors, (167), 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) [2024-10-10 22:02:48,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:02:48,113 INFO L93 Difference]: Finished difference Result 619 states and 686 transitions. [2024-10-10 22:02:48,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-10-10 22:02:48,114 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.9761904761904763) internal successors, (167), 42 states have internal predecessors, (167), 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 59 [2024-10-10 22:02:48,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:02:48,116 INFO L225 Difference]: With dead ends: 619 [2024-10-10 22:02:48,116 INFO L226 Difference]: Without dead ends: 610 [2024-10-10 22:02:48,117 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2676 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1304, Invalid=10038, Unknown=0, NotChecked=0, Total=11342 [2024-10-10 22:02:48,118 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 415 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 2884 mSolverCounterSat, 683 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 3567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 683 IncrementalHoareTripleChecker+Valid, 2884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-10-10 22:02:48,118 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 567 Invalid, 3567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [683 Valid, 2884 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-10-10 22:02:48,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2024-10-10 22:02:48,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 373. [2024-10-10 22:02:48,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 1.0994623655913978) internal successors, (409), 372 states have internal predecessors, (409), 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) [2024-10-10 22:02:48,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 409 transitions. [2024-10-10 22:02:48,198 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 409 transitions. Word has length 59 [2024-10-10 22:02:48,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:02:48,198 INFO L471 AbstractCegarLoop]: Abstraction has 373 states and 409 transitions. [2024-10-10 22:02:48,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.9761904761904763) internal successors, (167), 42 states have internal predecessors, (167), 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) [2024-10-10 22:02:48,199 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 409 transitions. [2024-10-10 22:02:48,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-10-10 22:02:48,200 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:02:48,200 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:02:48,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-10 22:02:48,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,18 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:48,400 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:02:48,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:02:48,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1081846900, now seen corresponding path program 8 times [2024-10-10 22:02:48,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:02:48,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936235257] [2024-10-10 22:02:48,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:48,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:02:48,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:48,845 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 136 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:48,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:48,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936235257] [2024-10-10 22:02:48,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936235257] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:02:48,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266882081] [2024-10-10 22:02:48,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:02:48,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:48,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:02:48,847 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:02:48,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-10 22:02:48,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:02:48,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:02:48,984 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-10 22:02:48,985 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:02:49,515 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 172 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:49,515 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:02:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 172 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:49,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266882081] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:02:49,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:02:49,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 45 [2024-10-10 22:02:49,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530443472] [2024-10-10 22:02:49,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:02:49,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-10-10 22:02:49,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:02:49,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-10-10 22:02:49,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=1485, Unknown=0, NotChecked=0, Total=1980 [2024-10-10 22:02:49,780 INFO L87 Difference]: Start difference. First operand 373 states and 409 transitions. Second operand has 45 states, 45 states have (on average 4.022222222222222) internal successors, (181), 45 states have internal predecessors, (181), 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) [2024-10-10 22:02:50,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:02:50,168 INFO L93 Difference]: Finished difference Result 758 states and 823 transitions. [2024-10-10 22:02:50,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-10 22:02:50,169 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 4.022222222222222) internal successors, (181), 45 states have internal predecessors, (181), 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 64 [2024-10-10 22:02:50,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:02:50,170 INFO L225 Difference]: With dead ends: 758 [2024-10-10 22:02:50,170 INFO L226 Difference]: Without dead ends: 461 [2024-10-10 22:02:50,171 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=628, Invalid=1922, Unknown=0, NotChecked=0, Total=2550 [2024-10-10 22:02:50,172 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 204 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-10 22:02:50,172 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 252 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-10 22:02:50,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2024-10-10 22:02:50,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 421. [2024-10-10 22:02:50,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.088095238095238) internal successors, (457), 420 states have internal predecessors, (457), 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) [2024-10-10 22:02:50,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 457 transitions. [2024-10-10 22:02:50,254 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 457 transitions. Word has length 64 [2024-10-10 22:02:50,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:02:50,254 INFO L471 AbstractCegarLoop]: Abstraction has 421 states and 457 transitions. [2024-10-10 22:02:50,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.022222222222222) internal successors, (181), 45 states have internal predecessors, (181), 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) [2024-10-10 22:02:50,255 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 457 transitions. [2024-10-10 22:02:50,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-10-10 22:02:50,256 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:02:50,256 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 7, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:02:50,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-10 22:02:50,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-10-10 22:02:50,456 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:02:50,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:02:50,457 INFO L85 PathProgramCache]: Analyzing trace with hash 102781057, now seen corresponding path program 9 times [2024-10-10 22:02:50,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:02:50,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136808815] [2024-10-10 22:02:50,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:50,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:02:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 16 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:51,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:51,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136808815] [2024-10-10 22:02:51,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136808815] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:02:51,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277530484] [2024-10-10 22:02:51,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:02:51,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:51,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:02:51,106 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:02:51,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-10 22:02:51,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-10-10 22:02:51,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:02:51,404 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-10-10 22:02:51,406 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:02:51,475 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 [2024-10-10 22:02:51,532 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 35 treesize of output 13 [2024-10-10 22:02:51,541 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 35 treesize of output 13 [2024-10-10 22:02:51,551 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 35 treesize of output 13 [2024-10-10 22:02:51,569 INFO L349 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2024-10-10 22:02:51,570 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 1 case distinctions, treesize of input 35 treesize of output 13 [2024-10-10 22:02:52,036 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 7 [2024-10-10 22:02:52,065 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 51 proven. 140 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-10 22:02:52,066 INFO L311 TraceCheckSpWp]: Computing backward predicates...