./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/max.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/max.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 97795e7b99ddd869ecccb7f865206a167342b52333873684a94abd35acf6650e --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 14:39:15,200 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 14:39:15,253 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 14:39:15,259 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 14:39:15,261 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 14:39:15,284 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 14:39:15,285 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 14:39:15,285 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 14:39:15,286 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 14:39:15,286 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 14:39:15,287 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 14:39:15,287 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 14:39:15,288 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 14:39:15,288 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 14:39:15,289 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 14:39:15,290 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 14:39:15,290 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 14:39:15,290 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 14:39:15,290 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 14:39:15,290 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 14:39:15,291 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 14:39:15,293 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 14:39:15,294 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 14:39:15,294 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 14:39:15,294 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 14:39:15,294 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 14:39:15,294 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 14:39:15,295 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 14:39:15,295 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 14:39:15,295 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 14:39:15,295 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 14:39:15,295 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 14:39:15,296 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 14:39:15,296 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 14:39:15,296 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 14:39:15,296 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 14:39:15,296 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 14:39:15,296 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 14:39:15,296 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 14:39:15,297 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 14:39:15,297 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 14:39:15,301 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 14:39:15,301 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97795e7b99ddd869ecccb7f865206a167342b52333873684a94abd35acf6650e [2024-10-12 14:39:15,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 14:39:15,548 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 14:39:15,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 14:39:15,551 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 14:39:15,551 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 14:39:15,551 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/max.i [2024-10-12 14:39:16,836 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 14:39:17,042 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 14:39:17,043 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/max.i [2024-10-12 14:39:17,051 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6e335d72/4b0d2ba7515c43e8861b06c53a67f3e5/FLAG7e3991e44 [2024-10-12 14:39:17,424 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6e335d72/4b0d2ba7515c43e8861b06c53a67f3e5 [2024-10-12 14:39:17,426 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 14:39:17,427 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 14:39:17,429 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 14:39:17,430 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 14:39:17,434 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 14:39:17,435 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 02:39:17" (1/1) ... [2024-10-12 14:39:17,439 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3633a4e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:39:17, skipping insertion in model container [2024-10-12 14:39:17,439 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 02:39:17" (1/1) ... [2024-10-12 14:39:17,456 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 14:39:17,609 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/reducercommutativity/max.i[1295,1308] [2024-10-12 14:39:17,612 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 14:39:17,618 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 14:39:17,632 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/reducercommutativity/max.i[1295,1308] [2024-10-12 14:39:17,633 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 14:39:17,645 INFO L204 MainTranslator]: Completed translation [2024-10-12 14:39:17,645 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:39:17 WrapperNode [2024-10-12 14:39:17,645 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 14:39:17,646 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 14:39:17,646 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 14:39:17,646 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 14:39:17,652 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:39:17" (1/1) ... [2024-10-12 14:39:17,657 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:39:17" (1/1) ... [2024-10-12 14:39:17,670 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2024-10-12 14:39:17,670 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 14:39:17,671 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 14:39:17,671 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 14:39:17,671 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 14:39:17,679 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:39:17" (1/1) ... [2024-10-12 14:39:17,679 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:39:17" (1/1) ... [2024-10-12 14:39:17,680 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:39:17" (1/1) ... [2024-10-12 14:39:17,692 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 4 writes are split as follows [0, 0, 4]. [2024-10-12 14:39:17,693 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:39:17" (1/1) ... [2024-10-12 14:39:17,693 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:39:17" (1/1) ... [2024-10-12 14:39:17,697 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:39:17" (1/1) ... [2024-10-12 14:39:17,699 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:39:17" (1/1) ... [2024-10-12 14:39:17,700 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:39:17" (1/1) ... [2024-10-12 14:39:17,700 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:39:17" (1/1) ... [2024-10-12 14:39:17,702 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 14:39:17,702 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 14:39:17,703 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 14:39:17,703 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 14:39:17,703 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:39:17" (1/1) ... [2024-10-12 14:39:17,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 14:39:17,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:39:17,740 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-12 14:39:17,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-12 14:39:17,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 14:39:17,779 INFO L130 BoogieDeclarations]: Found specification of procedure max [2024-10-12 14:39:17,779 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2024-10-12 14:39:17,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 14:39:17,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-12 14:39:17,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-12 14:39:17,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-12 14:39:17,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-12 14:39:17,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-12 14:39:17,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-12 14:39:17,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 14:39:17,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 14:39:17,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-12 14:39:17,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-12 14:39:17,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-12 14:39:17,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-12 14:39:17,865 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 14:39:17,867 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 14:39:18,035 INFO L? ?]: Removed 18 outVars from TransFormulas that were not future-live. [2024-10-12 14:39:18,035 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 14:39:18,057 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 14:39:18,058 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-12 14:39:18,058 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 02:39:18 BoogieIcfgContainer [2024-10-12 14:39:18,058 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 14:39:18,060 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 14:39:18,060 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 14:39:18,062 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 14:39:18,064 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 02:39:17" (1/3) ... [2024-10-12 14:39:18,065 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fc529a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 02:39:18, skipping insertion in model container [2024-10-12 14:39:18,065 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:39:17" (2/3) ... [2024-10-12 14:39:18,065 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fc529a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 02:39:18, skipping insertion in model container [2024-10-12 14:39:18,065 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 02:39:18" (3/3) ... [2024-10-12 14:39:18,066 INFO L112 eAbstractionObserver]: Analyzing ICFG max.i [2024-10-12 14:39:18,080 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 14:39:18,080 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 14:39:18,132 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 14:39:18,137 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;@2871c5d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 14:39:18,137 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 14:39:18,140 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:39:18,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-12 14:39:18,147 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:39:18,148 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:39:18,148 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:39:18,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:39:18,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1629596084, now seen corresponding path program 1 times [2024-10-12 14:39:18,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:39:18,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077192657] [2024-10-12 14:39:18,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:39:18,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:39:18,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:18,290 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-12 14:39:18,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:18,302 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-12 14:39:18,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:18,310 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-12 14:39:18,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 14:39:18,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:39:18,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077192657] [2024-10-12 14:39:18,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077192657] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:39:18,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:39:18,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 14:39:18,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652453890] [2024-10-12 14:39:18,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:39:18,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-12 14:39:18,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:39:18,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-12 14:39:18,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 14:39:18,349 INFO L87 Difference]: Start difference. First operand has 22 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-12 14:39:18,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:39:18,372 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2024-10-12 14:39:18,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-12 14:39:18,376 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), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-10-12 14:39:18,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:39:18,381 INFO L225 Difference]: With dead ends: 41 [2024-10-12 14:39:18,381 INFO L226 Difference]: Without dead ends: 19 [2024-10-12 14:39:18,384 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 14:39:18,386 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:39:18,387 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:39:18,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-10-12 14:39:18,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-10-12 14:39:18,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:39:18,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2024-10-12 14:39:18,414 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 24 [2024-10-12 14:39:18,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:39:18,414 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2024-10-12 14:39:18,414 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), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-12 14:39:18,414 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2024-10-12 14:39:18,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-12 14:39:18,416 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:39:18,416 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:39:18,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 14:39:18,416 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:39:18,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:39:18,417 INFO L85 PathProgramCache]: Analyzing trace with hash 259492283, now seen corresponding path program 1 times [2024-10-12 14:39:18,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:39:18,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508875787] [2024-10-12 14:39:18,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:39:18,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:39:18,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:18,575 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-12 14:39:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:18,602 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-12 14:39:18,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:18,613 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-12 14:39:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:18,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 14:39:18,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:39:18,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508875787] [2024-10-12 14:39:18,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508875787] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:39:18,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625373443] [2024-10-12 14:39:18,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:39:18,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:39:18,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:39:18,631 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:39:18,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 14:39:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:18,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-12 14:39:18,736 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:39:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-12 14:39:18,792 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 14:39:18,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625373443] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:39:18,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 14:39:18,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2024-10-12 14:39:18,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872878391] [2024-10-12 14:39:18,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:39:18,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-12 14:39:18,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:39:18,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-12 14:39:18,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-12 14:39:18,798 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-12 14:39:18,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:39:18,848 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2024-10-12 14:39:18,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 14:39:18,849 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-10-12 14:39:18,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:39:18,849 INFO L225 Difference]: With dead ends: 38 [2024-10-12 14:39:18,849 INFO L226 Difference]: Without dead ends: 22 [2024-10-12 14:39:18,850 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-12 14:39:18,851 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:39:18,851 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 20 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:39:18,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-10-12 14:39:18,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2024-10-12 14:39:18,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:39:18,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2024-10-12 14:39:18,861 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2024-10-12 14:39:18,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:39:18,862 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2024-10-12 14:39:18,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-12 14:39:18,862 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2024-10-12 14:39:18,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-12 14:39:18,864 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:39:18,864 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:39:18,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-12 14:39:19,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:39:19,069 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:39:19,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:39:19,070 INFO L85 PathProgramCache]: Analyzing trace with hash 932436953, now seen corresponding path program 1 times [2024-10-12 14:39:19,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:39:19,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020290742] [2024-10-12 14:39:19,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:39:19,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:39:19,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:19,171 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-12 14:39:19,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:19,181 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-12 14:39:19,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:19,190 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-12 14:39:19,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:19,198 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-12 14:39:19,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:39:19,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020290742] [2024-10-12 14:39:19,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020290742] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:39:19,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:39:19,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-12 14:39:19,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054393211] [2024-10-12 14:39:19,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:39:19,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-12 14:39:19,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:39:19,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-12 14:39:19,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-12 14:39:19,201 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-12 14:39:19,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:39:19,227 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2024-10-12 14:39:19,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 14:39:19,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2024-10-12 14:39:19,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:39:19,228 INFO L225 Difference]: With dead ends: 34 [2024-10-12 14:39:19,228 INFO L226 Difference]: Without dead ends: 21 [2024-10-12 14:39:19,229 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-12 14:39:19,229 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:39:19,230 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 22 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:39:19,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-10-12 14:39:19,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-10-12 14:39:19,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:39:19,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2024-10-12 14:39:19,233 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 33 [2024-10-12 14:39:19,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:39:19,235 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2024-10-12 14:39:19,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-12 14:39:19,235 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2024-10-12 14:39:19,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-12 14:39:19,236 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:39:19,236 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:39:19,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-12 14:39:19,236 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:39:19,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:39:19,237 INFO L85 PathProgramCache]: Analyzing trace with hash -2071615593, now seen corresponding path program 1 times [2024-10-12 14:39:19,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:39:19,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321263807] [2024-10-12 14:39:19,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:39:19,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:39:19,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:19,325 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-12 14:39:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:19,361 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-12 14:39:19,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:19,372 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-12 14:39:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:19,400 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-12 14:39:19,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:39:19,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321263807] [2024-10-12 14:39:19,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321263807] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:39:19,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561843716] [2024-10-12 14:39:19,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:39:19,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:39:19,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:39:19,412 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:39:19,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 14:39:19,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:19,525 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-12 14:39:19,526 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:39:19,576 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-12 14:39:19,576 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:39:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-12 14:39:19,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561843716] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:39:19,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:39:19,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2024-10-12 14:39:19,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601285636] [2024-10-12 14:39:19,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:39:19,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-12 14:39:19,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:39:19,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-12 14:39:19,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-12 14:39:19,663 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 14:39:19,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:39:19,721 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2024-10-12 14:39:19,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-12 14:39:19,722 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 34 [2024-10-12 14:39:19,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:39:19,722 INFO L225 Difference]: With dead ends: 44 [2024-10-12 14:39:19,723 INFO L226 Difference]: Without dead ends: 26 [2024-10-12 14:39:19,723 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2024-10-12 14:39:19,724 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:39:19,725 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 36 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:39:19,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-10-12 14:39:19,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2024-10-12 14:39:19,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:39:19,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2024-10-12 14:39:19,732 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 34 [2024-10-12 14:39:19,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:39:19,732 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2024-10-12 14:39:19,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 14:39:19,733 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2024-10-12 14:39:19,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-12 14:39:19,733 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:39:19,735 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:39:19,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-12 14:39:19,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-10-12 14:39:19,937 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:39:19,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:39:19,938 INFO L85 PathProgramCache]: Analyzing trace with hash 918466193, now seen corresponding path program 2 times [2024-10-12 14:39:19,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:39:19,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851078283] [2024-10-12 14:39:19,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:39:19,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:39:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:20,501 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-12 14:39:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:20,760 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-12 14:39:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:20,992 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-12 14:39:20,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:21,000 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-12 14:39:21,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:39:21,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851078283] [2024-10-12 14:39:21,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851078283] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:39:21,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447575804] [2024-10-12 14:39:21,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 14:39:21,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:39:21,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:39:21,007 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:39:21,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 14:39:21,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 14:39:21,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:39:21,089 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-10-12 14:39:21,093 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:39:21,164 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 22 treesize of output 7 [2024-10-12 14:39:21,403 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:39:21,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 23 [2024-10-12 14:39:21,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 14:39:21,462 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-10-12 14:39:21,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 35 [2024-10-12 14:39:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 45 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 14:39:22,109 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:39:22,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447575804] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:39:22,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 14:39:22,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2024-10-12 14:39:22,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897870098] [2024-10-12 14:39:22,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 14:39:22,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-12 14:39:22,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:39:22,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-12 14:39:22,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2024-10-12 14:39:22,267 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 32 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-12 14:39:23,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:39:23,317 INFO L93 Difference]: Finished difference Result 104 states and 135 transitions. [2024-10-12 14:39:23,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-12 14:39:23,317 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2024-10-12 14:39:23,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:39:23,320 INFO L225 Difference]: With dead ends: 104 [2024-10-12 14:39:23,320 INFO L226 Difference]: Without dead ends: 69 [2024-10-12 14:39:23,325 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=284, Invalid=2166, Unknown=0, NotChecked=0, Total=2450 [2024-10-12 14:39:23,326 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 51 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-12 14:39:23,326 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 127 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-12 14:39:23,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-10-12 14:39:23,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 48. [2024-10-12 14:39:23,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 40 states have internal predecessors, (50), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-10-12 14:39:23,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2024-10-12 14:39:23,342 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 43 [2024-10-12 14:39:23,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:39:23,342 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2024-10-12 14:39:23,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-12 14:39:23,342 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2024-10-12 14:39:23,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-12 14:39:23,343 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:39:23,343 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:39:23,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-12 14:39:23,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:39:23,544 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:39:23,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:39:23,545 INFO L85 PathProgramCache]: Analyzing trace with hash -886972141, now seen corresponding path program 1 times [2024-10-12 14:39:23,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:39:23,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782430537] [2024-10-12 14:39:23,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:39:23,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:39:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:24,654 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-12 14:39:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:24,987 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-12 14:39:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:25,427 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-12 14:39:25,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 1 proven. 68 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-12 14:39:25,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:39:25,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782430537] [2024-10-12 14:39:25,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782430537] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:39:25,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787027857] [2024-10-12 14:39:25,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:39:25,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:39:25,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:39:25,772 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:39:25,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 14:39:25,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:25,917 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-10-12 14:39:25,921 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:39:26,217 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 36 treesize of output 17 [2024-10-12 14:39:26,452 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 57 treesize of output 37 [2024-10-12 14:39:26,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-12 14:39:26,781 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 91 treesize of output 59 [2024-10-12 14:39:26,906 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 3 proven. 70 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-12 14:39:26,906 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:39:27,270 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 43 treesize of output 39 [2024-10-12 14:39:27,273 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 52 treesize of output 44 [2024-10-12 14:39:27,293 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 45 treesize of output 41 [2024-10-12 14:39:27,297 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 56 treesize of output 48 [2024-10-12 14:39:28,016 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 109 treesize of output 61 [2024-10-12 14:39:28,326 INFO L349 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2024-10-12 14:39:28,327 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 21 treesize of output 21 [2024-10-12 14:39:28,459 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 14:39:28,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787027857] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:39:28,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:39:28,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 25] total 67 [2024-10-12 14:39:28,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332691655] [2024-10-12 14:39:28,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:39:28,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-10-12 14:39:28,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:39:28,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-10-12 14:39:28,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=4155, Unknown=0, NotChecked=0, Total=4422 [2024-10-12 14:39:28,462 INFO L87 Difference]: Start difference. First operand 48 states and 63 transitions. Second operand has 67 states, 53 states have (on average 1.7358490566037736) internal successors, (92), 60 states have internal predecessors, (92), 7 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2024-10-12 14:39:31,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:39:31,095 INFO L93 Difference]: Finished difference Result 169 states and 233 transitions. [2024-10-12 14:39:31,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-10-12 14:39:31,095 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 53 states have (on average 1.7358490566037736) internal successors, (92), 60 states have internal predecessors, (92), 7 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) Word has length 43 [2024-10-12 14:39:31,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:39:31,099 INFO L225 Difference]: With dead ends: 169 [2024-10-12 14:39:31,099 INFO L226 Difference]: Without dead ends: 165 [2024-10-12 14:39:31,101 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3336 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=755, Invalid=9751, Unknown=0, NotChecked=0, Total=10506 [2024-10-12 14:39:31,102 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 105 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1960 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-10-12 14:39:31,102 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 135 Invalid, 1986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1960 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-10-12 14:39:31,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-10-12 14:39:31,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 94. [2024-10-12 14:39:31,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 81 states have internal predecessors, (104), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2024-10-12 14:39:31,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 132 transitions. [2024-10-12 14:39:31,121 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 132 transitions. Word has length 43 [2024-10-12 14:39:31,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:39:31,122 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 132 transitions. [2024-10-12 14:39:31,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 53 states have (on average 1.7358490566037736) internal successors, (92), 60 states have internal predecessors, (92), 7 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2024-10-12 14:39:31,122 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 132 transitions. [2024-10-12 14:39:31,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-12 14:39:31,127 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:39:31,127 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:39:31,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-12 14:39:31,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:39:31,328 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:39:31,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:39:31,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1696318767, now seen corresponding path program 2 times [2024-10-12 14:39:31,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:39:31,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454910460] [2024-10-12 14:39:31,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:39:31,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:39:31,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:31,884 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-12 14:39:31,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:32,298 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-12 14:39:32,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:32,305 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-12 14:39:32,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:32,632 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 19 proven. 49 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-12 14:39:32,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:39:32,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454910460] [2024-10-12 14:39:32,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454910460] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:39:32,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650300511] [2024-10-12 14:39:32,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 14:39:32,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:39:32,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:39:32,635 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:39:32,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-12 14:39:32,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 14:39:32,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:39:32,718 WARN L253 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 113 conjuncts are in the unsatisfiable core [2024-10-12 14:39:32,722 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:39:33,080 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 64 treesize of output 33 [2024-10-12 14:39:33,901 INFO L349 Elim1Store]: treesize reduction 32, result has 54.9 percent of original size [2024-10-12 14:39:33,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 135 treesize of output 120 [2024-10-12 14:39:34,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2024-10-12 14:39:34,714 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:39:34,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 146 treesize of output 98 [2024-10-12 14:39:34,845 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 5 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:39:34,845 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:39:45,760 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 435 treesize of output 371 [2024-10-12 14:39:45,765 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 289 treesize of output 201 [2024-10-12 14:39:49,273 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:39:49,273 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 302 treesize of output 264 [2024-10-12 14:39:49,337 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 47 treesize of output 31 [2024-10-12 14:39:49,347 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:39:49,348 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 206 treesize of output 144 [2024-10-12 14:39:49,398 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 302 treesize of output 256 [2024-10-12 14:39:49,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 14:39:49,404 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 84 [2024-10-12 14:39:49,731 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 15 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-12 14:39:49,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650300511] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:39:49,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:39:49,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 34, 32] total 82 [2024-10-12 14:39:49,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196124599] [2024-10-12 14:39:49,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:39:49,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-10-12 14:39:49,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:39:49,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-10-12 14:39:49,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=6225, Unknown=3, NotChecked=0, Total=6642 [2024-10-12 14:39:49,734 INFO L87 Difference]: Start difference. First operand 94 states and 132 transitions. Second operand has 82 states, 70 states have (on average 1.4857142857142858) internal successors, (104), 73 states have internal predecessors, (104), 8 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2024-10-12 14:39:56,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 14:40:00,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 14:40:10,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 14:40:14,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 14:40:24,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 14:40:28,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 14:40:28,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:40:28,096 INFO L93 Difference]: Finished difference Result 286 states and 387 transitions. [2024-10-12 14:40:28,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2024-10-12 14:40:28,097 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 70 states have (on average 1.4857142857142858) internal successors, (104), 73 states have internal predecessors, (104), 8 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 43 [2024-10-12 14:40:28,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:40:28,099 INFO L225 Difference]: With dead ends: 286 [2024-10-12 14:40:28,099 INFO L226 Difference]: Without dead ends: 241 [2024-10-12 14:40:28,105 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10860 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=2701, Invalid=32078, Unknown=3, NotChecked=0, Total=34782 [2024-10-12 14:40:28,106 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 343 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 3276 mSolverCounterSat, 168 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 3450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 3276 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.2s IncrementalHoareTripleChecker+Time [2024-10-12 14:40:28,106 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 197 Invalid, 3450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 3276 Invalid, 6 Unknown, 0 Unchecked, 27.2s Time] [2024-10-12 14:40:28,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2024-10-12 14:40:28,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 130. [2024-10-12 14:40:28,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 110 states have (on average 1.3272727272727274) internal successors, (146), 115 states have internal predecessors, (146), 10 states have call successors, (10), 5 states have call predecessors, (10), 9 states have return successors, (23), 9 states have call predecessors, (23), 10 states have call successors, (23) [2024-10-12 14:40:28,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 179 transitions. [2024-10-12 14:40:28,134 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 179 transitions. Word has length 43 [2024-10-12 14:40:28,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:40:28,134 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 179 transitions. [2024-10-12 14:40:28,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 70 states have (on average 1.4857142857142858) internal successors, (104), 73 states have internal predecessors, (104), 8 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2024-10-12 14:40:28,134 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 179 transitions. [2024-10-12 14:40:28,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-12 14:40:28,138 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:40:28,138 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:40:28,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-12 14:40:28,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:40:28,339 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:40:28,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:40:28,340 INFO L85 PathProgramCache]: Analyzing trace with hash -995254189, now seen corresponding path program 3 times [2024-10-12 14:40:28,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:40:28,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136919354] [2024-10-12 14:40:28,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:40:28,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:40:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:40:28,697 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-12 14:40:28,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:40:28,965 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-12 14:40:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:40:28,972 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-12 14:40:28,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:40:29,132 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 19 proven. 48 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-12 14:40:29,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:40:29,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136919354] [2024-10-12 14:40:29,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136919354] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:40:29,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593017846] [2024-10-12 14:40:29,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 14:40:29,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:40:29,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:40:29,136 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:40:29,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-12 14:40:29,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-10-12 14:40:29,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:40:29,217 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-12 14:40:29,219 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:40:29,419 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 [2024-10-12 14:40:29,462 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 23 treesize of output 1 [2024-10-12 14:40:29,900 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 40 proven. 27 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-12 14:40:29,900 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:40:30,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593017846] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:40:30,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 14:40:30,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 34 [2024-10-12 14:40:30,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651160118] [2024-10-12 14:40:30,004 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 14:40:30,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-12 14:40:30,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:40:30,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-12 14:40:30,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1076, Unknown=0, NotChecked=0, Total=1190 [2024-10-12 14:40:30,005 INFO L87 Difference]: Start difference. First operand 130 states and 179 transitions. Second operand has 34 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 32 states have internal predecessors, (63), 4 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-12 14:40:34,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 14:40:38,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 14:40:42,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 14:40:45,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 14:40:50,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 14:40:52,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:40:52,003 INFO L93 Difference]: Finished difference Result 566 states and 801 transitions. [2024-10-12 14:40:52,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-10-12 14:40:52,003 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 32 states have internal predecessors, (63), 4 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 43 [2024-10-12 14:40:52,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:40:52,006 INFO L225 Difference]: With dead ends: 566 [2024-10-12 14:40:52,006 INFO L226 Difference]: Without dead ends: 482 [2024-10-12 14:40:52,009 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=547, Invalid=5153, Unknown=0, NotChecked=0, Total=5700 [2024-10-12 14:40:52,009 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 101 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 1771 mSolverCounterSat, 30 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1771 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.6s IncrementalHoareTripleChecker+Time [2024-10-12 14:40:52,009 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 153 Invalid, 1808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1771 Invalid, 7 Unknown, 0 Unchecked, 20.6s Time] [2024-10-12 14:40:52,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2024-10-12 14:40:52,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 350. [2024-10-12 14:40:52,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 300 states have (on average 1.33) internal successors, (399), 319 states have internal predecessors, (399), 22 states have call successors, (22), 14 states have call predecessors, (22), 27 states have return successors, (69), 16 states have call predecessors, (69), 22 states have call successors, (69) [2024-10-12 14:40:52,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 490 transitions. [2024-10-12 14:40:52,117 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 490 transitions. Word has length 43 [2024-10-12 14:40:52,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:40:52,118 INFO L471 AbstractCegarLoop]: Abstraction has 350 states and 490 transitions. [2024-10-12 14:40:52,119 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 32 states have internal predecessors, (63), 4 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-12 14:40:52,119 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 490 transitions. [2024-10-12 14:40:52,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-12 14:40:52,120 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:40:52,120 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:40:52,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-12 14:40:52,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:40:52,321 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:40:52,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:40:52,322 INFO L85 PathProgramCache]: Analyzing trace with hash -734885935, now seen corresponding path program 4 times [2024-10-12 14:40:52,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:40:52,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265890709] [2024-10-12 14:40:52,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:40:52,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:40:52,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat