./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bAnd5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bAnd5.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d475be4701a825f0568ebf884900dce77e1216a215283bc51d05a41cc9a8ddb5 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-10 22:05:26,255 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-10 22:05:26,326 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-10 22:05:26,335 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-10 22:05:26,336 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-10 22:05:26,361 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-10 22:05:26,362 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-10 22:05:26,363 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-10 22:05:26,363 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-10 22:05:26,367 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-10 22:05:26,367 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-10 22:05:26,367 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-10 22:05:26,368 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-10 22:05:26,368 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-10 22:05:26,368 INFO L153 SettingsManager]: * Use SBE=true [2024-10-10 22:05:26,369 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-10 22:05:26,369 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-10 22:05:26,369 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-10 22:05:26,369 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-10 22:05:26,370 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-10 22:05:26,370 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-10 22:05:26,372 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-10 22:05:26,372 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-10 22:05:26,372 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-10 22:05:26,372 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-10 22:05:26,373 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-10 22:05:26,373 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-10 22:05:26,373 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-10 22:05:26,374 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-10 22:05:26,374 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-10 22:05:26,374 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-10 22:05:26,374 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-10 22:05:26,375 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 22:05:26,375 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-10 22:05:26,375 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-10 22:05:26,376 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-10 22:05:26,376 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-10 22:05:26,376 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-10 22:05:26,377 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-10 22:05:26,377 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-10 22:05:26,377 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-10 22:05:26,378 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-10 22:05:26,378 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d475be4701a825f0568ebf884900dce77e1216a215283bc51d05a41cc9a8ddb5 [2024-10-10 22:05:26,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-10 22:05:26,651 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-10 22:05:26,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-10 22:05:26,656 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-10 22:05:26,656 INFO L274 PluginConnector]: CDTParser initialized [2024-10-10 22:05:26,658 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bAnd5.i [2024-10-10 22:05:28,048 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-10 22:05:28,229 INFO L384 CDTParser]: Found 1 translation units. [2024-10-10 22:05:28,229 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bAnd5.i [2024-10-10 22:05:28,241 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/213c7fea6/7e3ad6d9d8f5452cb63760ea6ee1db6a/FLAG7e8d424f8 [2024-10-10 22:05:28,256 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/213c7fea6/7e3ad6d9d8f5452cb63760ea6ee1db6a [2024-10-10 22:05:28,259 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-10 22:05:28,261 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-10 22:05:28,263 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-10 22:05:28,264 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-10 22:05:28,268 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-10 22:05:28,268 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 10:05:28" (1/1) ... [2024-10-10 22:05:28,269 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@381af835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:28, skipping insertion in model container [2024-10-10 22:05:28,269 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 10:05:28" (1/1) ... [2024-10-10 22:05:28,289 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-10 22:05:28,525 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bAnd5.i[1369,1382] [2024-10-10 22:05:28,534 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 22:05:28,550 INFO L200 MainTranslator]: Completed pre-run [2024-10-10 22:05:28,583 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bAnd5.i[1369,1382] [2024-10-10 22:05:28,584 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 22:05:28,598 INFO L204 MainTranslator]: Completed translation [2024-10-10 22:05:28,599 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:28 WrapperNode [2024-10-10 22:05:28,599 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-10 22:05:28,600 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-10 22:05:28,600 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-10 22:05:28,600 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-10 22:05:28,607 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:28" (1/1) ... [2024-10-10 22:05:28,613 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:28" (1/1) ... [2024-10-10 22:05:28,632 INFO L138 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 82 [2024-10-10 22:05:28,633 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-10 22:05:28,634 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-10 22:05:28,634 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-10 22:05:28,634 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-10 22:05:28,644 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:28" (1/1) ... [2024-10-10 22:05:28,645 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:28" (1/1) ... [2024-10-10 22:05:28,649 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:28" (1/1) ... [2024-10-10 22:05:28,662 INFO L175 MemorySlicer]: Split 21 memory accesses to 3 slices as follows [11, 2, 8]. 52 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [0, 2, 8]. The 5 writes are split as follows [5, 0, 0]. [2024-10-10 22:05:28,663 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:28" (1/1) ... [2024-10-10 22:05:28,663 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:28" (1/1) ... [2024-10-10 22:05:28,669 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:28" (1/1) ... [2024-10-10 22:05:28,675 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:28" (1/1) ... [2024-10-10 22:05:28,676 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:28" (1/1) ... [2024-10-10 22:05:28,677 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:28" (1/1) ... [2024-10-10 22:05:28,680 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-10 22:05:28,681 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-10 22:05:28,681 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-10 22:05:28,681 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-10 22:05:28,682 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:28" (1/1) ... [2024-10-10 22:05:28,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 22:05:28,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:05:28,718 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-10 22:05:28,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-10 22:05:28,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-10 22:05:28,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-10 22:05:28,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-10 22:05:28,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-10 22:05:28,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-10 22:05:28,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-10 22:05:28,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-10 22:05:28,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-10 22:05:28,778 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2024-10-10 22:05:28,778 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2024-10-10 22:05:28,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-10 22:05:28,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-10 22:05:28,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-10 22:05:28,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-10 22:05:28,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-10 22:05:28,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-10 22:05:28,866 INFO L238 CfgBuilder]: Building ICFG [2024-10-10 22:05:28,868 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-10 22:05:29,114 INFO L? ?]: Removed 20 outVars from TransFormulas that were not future-live. [2024-10-10 22:05:29,114 INFO L287 CfgBuilder]: Performing block encoding [2024-10-10 22:05:29,163 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-10 22:05:29,163 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-10 22:05:29,164 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 10:05:29 BoogieIcfgContainer [2024-10-10 22:05:29,164 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-10 22:05:29,168 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-10 22:05:29,169 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-10 22:05:29,173 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-10 22:05:29,173 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.10 10:05:28" (1/3) ... [2024-10-10 22:05:29,174 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eb868e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 10:05:29, skipping insertion in model container [2024-10-10 22:05:29,176 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:28" (2/3) ... [2024-10-10 22:05:29,177 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eb868e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 10:05:29, skipping insertion in model container [2024-10-10 22:05:29,177 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 10:05:29" (3/3) ... [2024-10-10 22:05:29,180 INFO L112 eAbstractionObserver]: Analyzing ICFG bAnd5.i [2024-10-10 22:05:29,197 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-10 22:05:29,198 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-10 22:05:29,252 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-10 22:05:29,259 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;@196b7b4a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-10 22:05:29,259 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-10 22:05:29,264 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 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) [2024-10-10 22:05:29,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-10 22:05:29,272 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:05:29,273 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:05:29,274 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:05:29,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:05:29,281 INFO L85 PathProgramCache]: Analyzing trace with hash -680609397, now seen corresponding path program 1 times [2024-10-10 22:05:29,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:05:29,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939619198] [2024-10-10 22:05:29,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:29,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:05:29,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:29,609 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-10 22:05:29,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:29,634 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-10 22:05:29,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:29,651 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-10 22:05:29,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:29,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-10 22:05:29,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:05:29,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939619198] [2024-10-10 22:05:29,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939619198] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:05:29,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:05:29,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-10 22:05:29,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382122612] [2024-10-10 22:05:29,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:05:29,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 22:05:29,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:05:29,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 22:05:29,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-10 22:05:29,706 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 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 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-10 22:05:29,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:05:29,774 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2024-10-10 22:05:29,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 22:05:29,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2024-10-10 22:05:29,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:05:29,786 INFO L225 Difference]: With dead ends: 50 [2024-10-10 22:05:29,786 INFO L226 Difference]: Without dead ends: 24 [2024-10-10 22:05:29,791 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-10 22:05:29,795 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:05:29,799 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:05:29,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-10-10 22:05:29,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-10-10 22:05:29,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 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) [2024-10-10 22:05:29,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2024-10-10 22:05:29,833 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 26 [2024-10-10 22:05:29,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:05:29,833 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-10-10 22:05:29,834 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-10 22:05:29,834 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2024-10-10 22:05:29,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-10 22:05:29,836 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:05:29,836 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:05:29,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-10 22:05:29,837 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:05:29,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:05:29,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1529577753, now seen corresponding path program 1 times [2024-10-10 22:05:29,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:05:29,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161602690] [2024-10-10 22:05:29,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:29,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:05:29,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:30,058 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-10 22:05:30,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:30,113 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-10 22:05:30,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:30,127 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-10 22:05:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:30,136 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-10 22:05:30,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:05:30,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161602690] [2024-10-10 22:05:30,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161602690] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:05:30,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795251799] [2024-10-10 22:05:30,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:30,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:30,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:05:30,140 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:05:30,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-10 22:05:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:30,254 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-10 22:05:30,259 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:05:30,334 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-10 22:05:30,335 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:05:30,394 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-10 22:05:30,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795251799] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:05:30,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:05:30,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-10-10 22:05:30,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441727321] [2024-10-10 22:05:30,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:05:30,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-10 22:05:30,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:05:30,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-10 22:05:30,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-10-10 22:05:30,403 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-10 22:05:30,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:05:30,515 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2024-10-10 22:05:30,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-10 22:05:30,516 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 27 [2024-10-10 22:05:30,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:05:30,517 INFO L225 Difference]: With dead ends: 50 [2024-10-10 22:05:30,517 INFO L226 Difference]: Without dead ends: 30 [2024-10-10 22:05:30,518 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-10-10 22:05:30,519 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:05:30,520 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 71 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:05:30,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-10-10 22:05:30,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2024-10-10 22:05:30,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 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) [2024-10-10 22:05:30,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2024-10-10 22:05:30,529 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 27 [2024-10-10 22:05:30,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:05:30,530 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2024-10-10 22:05:30,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-10 22:05:30,532 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2024-10-10 22:05:30,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-10 22:05:30,533 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:05:30,533 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:05:30,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-10 22:05:30,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:30,734 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:05:30,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:05:30,734 INFO L85 PathProgramCache]: Analyzing trace with hash 468060252, now seen corresponding path program 1 times [2024-10-10 22:05:30,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:05:30,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922937274] [2024-10-10 22:05:30,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:30,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:05:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:30,863 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-10 22:05:30,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:30,899 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-10 22:05:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:30,924 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-10 22:05:30,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:30,935 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-10 22:05:30,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:05:30,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922937274] [2024-10-10 22:05:30,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922937274] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:05:30,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4653341] [2024-10-10 22:05:30,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:30,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:30,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:05:30,939 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:05:30,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-10 22:05:31,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:31,034 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-10 22:05:31,036 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:05:31,101 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-10 22:05:31,105 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-10 22:05:31,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4653341] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:05:31,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-10 22:05:31,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2024-10-10 22:05:31,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781924140] [2024-10-10 22:05:31,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:05:31,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-10 22:05:31,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:05:31,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-10 22:05:31,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-10 22:05:31,111 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 22:05:31,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:05:31,153 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2024-10-10 22:05:31,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-10 22:05:31,154 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2024-10-10 22:05:31,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:05:31,155 INFO L225 Difference]: With dead ends: 42 [2024-10-10 22:05:31,155 INFO L226 Difference]: Without dead ends: 27 [2024-10-10 22:05:31,155 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-10 22:05:31,156 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 13 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:05:31,157 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 30 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:05:31,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-10-10 22:05:31,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-10-10 22:05:31,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 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) [2024-10-10 22:05:31,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2024-10-10 22:05:31,166 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 37 [2024-10-10 22:05:31,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:05:31,167 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2024-10-10 22:05:31,168 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 22:05:31,168 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2024-10-10 22:05:31,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-10 22:05:31,169 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:05:31,170 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:05:31,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-10 22:05:31,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:31,374 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:05:31,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:05:31,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1596247799, now seen corresponding path program 1 times [2024-10-10 22:05:31,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:05:31,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930402585] [2024-10-10 22:05:31,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:31,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:05:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:31,952 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-10 22:05:31,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:32,059 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-10 22:05:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:32,137 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-10 22:05:32,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:32,219 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-10 22:05:32,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:05:32,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930402585] [2024-10-10 22:05:32,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930402585] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:05:32,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63874040] [2024-10-10 22:05:32,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:32,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:32,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:05:32,223 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:05:32,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-10 22:05:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:32,397 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-10 22:05:32,399 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:05:32,532 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-10 22:05:32,532 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:05:32,883 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-10 22:05:32,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63874040] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:05:32,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:05:32,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 13] total 19 [2024-10-10 22:05:32,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376230562] [2024-10-10 22:05:32,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:05:32,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-10 22:05:32,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:05:32,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-10 22:05:32,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2024-10-10 22:05:32,886 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 19 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-10 22:05:33,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:05:33,074 INFO L93 Difference]: Finished difference Result 70 states and 98 transitions. [2024-10-10 22:05:33,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-10 22:05:33,075 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2024-10-10 22:05:33,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:05:33,078 INFO L225 Difference]: With dead ends: 70 [2024-10-10 22:05:33,079 INFO L226 Difference]: Without dead ends: 48 [2024-10-10 22:05:33,080 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2024-10-10 22:05:33,081 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 8 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-10 22:05:33,082 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 330 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-10 22:05:33,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-10-10 22:05:33,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2024-10-10 22:05:33,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 32 states have internal predecessors, (38), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2024-10-10 22:05:33,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2024-10-10 22:05:33,100 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 38 [2024-10-10 22:05:33,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:05:33,100 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2024-10-10 22:05:33,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-10 22:05:33,101 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2024-10-10 22:05:33,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-10 22:05:33,102 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:05:33,102 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:05:33,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-10 22:05:33,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:33,303 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:05:33,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:05:33,304 INFO L85 PathProgramCache]: Analyzing trace with hash 193504083, now seen corresponding path program 1 times [2024-10-10 22:05:33,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:05:33,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78161785] [2024-10-10 22:05:33,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:33,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:05:33,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:34,147 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-10 22:05:34,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:34,154 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-10 22:05:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:34,328 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-10 22:05:34,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 22:05:34,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:05:34,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78161785] [2024-10-10 22:05:34,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78161785] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:05:34,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296528617] [2024-10-10 22:05:34,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:34,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:34,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:05:34,462 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:05:34,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-10 22:05:34,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:34,547 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-10-10 22:05:34,551 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:05:34,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-10 22:05:34,882 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:05:34,883 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 38 treesize of output 22 [2024-10-10 22:05:35,183 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:05:35,183 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 38 treesize of output 25 [2024-10-10 22:05:35,256 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:05:35,257 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 42 treesize of output 22 [2024-10-10 22:05:35,635 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:05:35,635 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:05:36,595 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 176 treesize of output 156 [2024-10-10 22:05:36,605 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:05:36,605 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 135 treesize of output 125 [2024-10-10 22:05:36,725 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-10 22:05:36,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296528617] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:05:36,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:05:36,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22, 18] total 50 [2024-10-10 22:05:36,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923831976] [2024-10-10 22:05:36,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:05:36,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-10-10 22:05:36,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:05:36,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-10-10 22:05:36,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=2173, Unknown=0, NotChecked=0, Total=2450 [2024-10-10 22:05:36,731 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 50 states, 47 states have (on average 1.7446808510638299) internal successors, (82), 46 states have internal predecessors, (82), 7 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2024-10-10 22:05:38,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:05:38,920 INFO L93 Difference]: Finished difference Result 209 states and 307 transitions. [2024-10-10 22:05:38,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-10-10 22:05:38,921 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 47 states have (on average 1.7446808510638299) internal successors, (82), 46 states have internal predecessors, (82), 7 states have call successors, (9), 4 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 39 [2024-10-10 22:05:38,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:05:38,927 INFO L225 Difference]: With dead ends: 209 [2024-10-10 22:05:38,927 INFO L226 Difference]: Without dead ends: 174 [2024-10-10 22:05:38,933 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=652, Invalid=4750, Unknown=0, NotChecked=0, Total=5402 [2024-10-10 22:05:38,933 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 208 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:05:38,934 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 270 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1304 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-10 22:05:38,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-10-10 22:05:38,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 140. [2024-10-10 22:05:38,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 112 states have (on average 1.2946428571428572) internal successors, (145), 120 states have internal predecessors, (145), 16 states have call successors, (16), 4 states have call predecessors, (16), 11 states have return successors, (55), 15 states have call predecessors, (55), 16 states have call successors, (55) [2024-10-10 22:05:38,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 216 transitions. [2024-10-10 22:05:38,988 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 216 transitions. Word has length 39 [2024-10-10 22:05:38,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:05:38,992 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 216 transitions. [2024-10-10 22:05:38,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 47 states have (on average 1.7446808510638299) internal successors, (82), 46 states have internal predecessors, (82), 7 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2024-10-10 22:05:38,993 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 216 transitions. [2024-10-10 22:05:38,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-10 22:05:38,997 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:05:38,998 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:05:39,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-10 22:05:39,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:39,198 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:05:39,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:05:39,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1746435567, now seen corresponding path program 2 times [2024-10-10 22:05:39,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:05:39,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742701415] [2024-10-10 22:05:39,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:39,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:05:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:39,862 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-10 22:05:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:40,016 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-10 22:05:40,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:40,026 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-10 22:05:40,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:40,152 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 22:05:40,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:05:40,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742701415] [2024-10-10 22:05:40,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742701415] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:05:40,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498883304] [2024-10-10 22:05:40,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:05:40,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:40,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:05:40,155 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:05:40,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-10 22:05:40,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:05:40,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:05:40,232 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-10-10 22:05:40,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:05:40,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-10 22:05:40,438 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:05:40,438 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 42 treesize of output 22 [2024-10-10 22:05:40,643 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-10 22:05:40,643 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:05:41,025 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-10 22:05:41,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498883304] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:05:41,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:05:41,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 10] total 34 [2024-10-10 22:05:41,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37880678] [2024-10-10 22:05:41,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:05:41,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-10 22:05:41,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:05:41,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-10 22:05:41,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2024-10-10 22:05:41,029 INFO L87 Difference]: Start difference. First operand 140 states and 216 transitions. Second operand has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 7 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2024-10-10 22:05:45,067 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] [2024-10-10 22:05:49,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-10 22:05:53,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-10 22:05:57,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-10 22:06:01,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-10 22:06:05,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-10 22:06:09,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-10 22:06:11,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-10 22:06:15,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-10 22:06:16,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-10 22:06:20,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-10 22:06:21,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:06:21,736 INFO L93 Difference]: Finished difference Result 306 states and 434 transitions. [2024-10-10 22:06:21,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-10 22:06:21,737 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 7 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) Word has length 39 [2024-10-10 22:06:21,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:06:21,739 INFO L225 Difference]: With dead ends: 306 [2024-10-10 22:06:21,739 INFO L226 Difference]: Without dead ends: 189 [2024-10-10 22:06:21,741 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=329, Invalid=2121, Unknown=0, NotChecked=0, Total=2450 [2024-10-10 22:06:21,742 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 107 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 52 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.3s IncrementalHoareTripleChecker+Time [2024-10-10 22:06:21,742 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 194 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 730 Invalid, 12 Unknown, 0 Unchecked, 40.3s Time] [2024-10-10 22:06:21,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2024-10-10 22:06:21,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 162. [2024-10-10 22:06:21,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 131 states have (on average 1.2748091603053435) internal successors, (167), 139 states have internal predecessors, (167), 17 states have call successors, (17), 6 states have call predecessors, (17), 13 states have return successors, (48), 16 states have call predecessors, (48), 17 states have call successors, (48) [2024-10-10 22:06:21,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 232 transitions. [2024-10-10 22:06:21,770 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 232 transitions. Word has length 39 [2024-10-10 22:06:21,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:06:21,771 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 232 transitions. [2024-10-10 22:06:21,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 7 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2024-10-10 22:06:21,771 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 232 transitions. [2024-10-10 22:06:21,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-10 22:06:21,773 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:06:21,773 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:06:21,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-10 22:06:21,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:06:21,978 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:06:21,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:06:21,978 INFO L85 PathProgramCache]: Analyzing trace with hash 2135493373, now seen corresponding path program 3 times [2024-10-10 22:06:21,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:06:21,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920096643] [2024-10-10 22:06:21,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:06:21,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:06:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:22,056 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-10 22:06:22,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:22,087 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-10 22:06:22,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:22,092 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-10 22:06:22,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:22,097 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-10 22:06:22,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:06:22,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920096643] [2024-10-10 22:06:22,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920096643] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:06:22,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344013074] [2024-10-10 22:06:22,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:06:22,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:06:22,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:06:22,101 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:06:22,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-10 22:06:22,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-10 22:06:22,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:06:22,189 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-10 22:06:22,191 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:06:22,270 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-10 22:06:22,271 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:06:22,376 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-10 22:06:22,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344013074] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:06:22,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:06:22,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 14 [2024-10-10 22:06:22,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866807224] [2024-10-10 22:06:22,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:06:22,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-10 22:06:22,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:06:22,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-10 22:06:22,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-10-10 22:06:22,379 INFO L87 Difference]: Start difference. First operand 162 states and 232 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-10-10 22:06:22,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:06:22,553 INFO L93 Difference]: Finished difference Result 352 states and 511 transitions. [2024-10-10 22:06:22,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-10 22:06:22,554 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 40 [2024-10-10 22:06:22,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:06:22,557 INFO L225 Difference]: With dead ends: 352 [2024-10-10 22:06:22,557 INFO L226 Difference]: Without dead ends: 280 [2024-10-10 22:06:22,558 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-10-10 22:06:22,558 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 76 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:06:22,559 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 220 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:06:22,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2024-10-10 22:06:22,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 240. [2024-10-10 22:06:22,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 199 states have (on average 1.271356783919598) internal successors, (253), 210 states have internal predecessors, (253), 21 states have call successors, (21), 9 states have call predecessors, (21), 19 states have return successors, (70), 20 states have call predecessors, (70), 21 states have call successors, (70) [2024-10-10 22:06:22,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 344 transitions. [2024-10-10 22:06:22,598 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 344 transitions. Word has length 40 [2024-10-10 22:06:22,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:06:22,598 INFO L471 AbstractCegarLoop]: Abstraction has 240 states and 344 transitions. [2024-10-10 22:06:22,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-10-10 22:06:22,599 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 344 transitions. [2024-10-10 22:06:22,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-10 22:06:22,601 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:06:22,601 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:06:22,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-10 22:06:22,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-10 22:06:22,805 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:06:22,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:06:22,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1651868637, now seen corresponding path program 1 times [2024-10-10 22:06:22,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:06:22,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328628768] [2024-10-10 22:06:22,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:06:22,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:06:22,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:24,774 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-10 22:06:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:25,184 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-10 22:06:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:25,613 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-10 22:06:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-10 22:06:25,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:06:25,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328628768] [2024-10-10 22:06:25,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328628768] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:06:25,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058248575] [2024-10-10 22:06:25,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:06:25,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:06:25,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:06:25,920 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:06:25,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-10 22:06:26,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:26,006 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 93 conjuncts are in the unsatisfiable core [2024-10-10 22:06:26,010 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:06:26,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-10 22:06:26,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-10-10 22:06:26,430 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 [2024-10-10 22:06:27,036 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 98 treesize of output 65 [2024-10-10 22:06:27,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:06:27,225 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-10-10 22:06:27,225 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 117 treesize of output 72 [2024-10-10 22:06:27,522 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 124 treesize of output 76 [2024-10-10 22:06:27,648 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-10 22:06:27,648 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:06:28,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058248575] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:06:28,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-10 22:06:28,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 46 [2024-10-10 22:06:28,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328880431] [2024-10-10 22:06:28,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-10 22:06:28,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-10-10 22:06:28,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:06:28,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-10-10 22:06:28,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2573, Unknown=0, NotChecked=0, Total=2756 [2024-10-10 22:06:28,903 INFO L87 Difference]: Start difference. First operand 240 states and 344 transitions. Second operand has 46 states, 36 states have (on average 1.75) internal successors, (63), 39 states have internal predecessors, (63), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-10 22:06:30,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:06:30,863 INFO L93 Difference]: Finished difference Result 345 states and 519 transitions. [2024-10-10 22:06:30,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-10 22:06:30,864 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 36 states have (on average 1.75) internal successors, (63), 39 states have internal predecessors, (63), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 41 [2024-10-10 22:06:30,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:06:30,869 INFO L225 Difference]: With dead ends: 345 [2024-10-10 22:06:30,869 INFO L226 Difference]: Without dead ends: 341 [2024-10-10 22:06:30,871 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=364, Invalid=4192, Unknown=0, NotChecked=0, Total=4556 [2024-10-10 22:06:30,871 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 82 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-10 22:06:30,871 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 121 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-10 22:06:30,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2024-10-10 22:06:30,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 294. [2024-10-10 22:06:30,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 244 states have (on average 1.319672131147541) internal successors, (322), 259 states have internal predecessors, (322), 26 states have call successors, (26), 9 states have call predecessors, (26), 23 states have return successors, (102), 25 states have call predecessors, (102), 26 states have call successors, (102) [2024-10-10 22:06:30,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 450 transitions. [2024-10-10 22:06:30,933 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 450 transitions. Word has length 41 [2024-10-10 22:06:30,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:06:30,933 INFO L471 AbstractCegarLoop]: Abstraction has 294 states and 450 transitions. [2024-10-10 22:06:30,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 36 states have (on average 1.75) internal successors, (63), 39 states have internal predecessors, (63), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-10 22:06:30,933 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 450 transitions. [2024-10-10 22:06:30,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-10 22:06:30,936 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:06:30,936 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:06:30,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-10 22:06:31,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:06:31,137 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:06:31,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:06:31,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1443753526, now seen corresponding path program 1 times [2024-10-10 22:06:31,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:06:31,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333782971] [2024-10-10 22:06:31,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:06:31,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:06:31,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:31,678 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-10 22:06:31,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:31,785 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-10 22:06:31,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:31,791 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-10 22:06:31,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:31,855 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-10 22:06:31,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:06:31,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333782971] [2024-10-10 22:06:31,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333782971] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:06:31,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593147217] [2024-10-10 22:06:31,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:06:31,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:06:31,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:06:31,859 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:06:31,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-10 22:06:31,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:31,944 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-10-10 22:06:31,947 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:06:31,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-10 22:06:32,138 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:06:32,138 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 34 treesize of output 18 [2024-10-10 22:06:32,252 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:06:32,253 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 34 treesize of output 21 [2024-10-10 22:06:32,295 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:06:32,296 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 27 treesize of output 18 [2024-10-10 22:06:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-10 22:06:32,466 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:06:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-10 22:06:48,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593147217] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:06:48,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:06:48,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 12] total 38 [2024-10-10 22:06:48,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690007176] [2024-10-10 22:06:48,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:06:48,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-10 22:06:48,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:06:48,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-10 22:06:48,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1226, Unknown=3, NotChecked=0, Total=1406 [2024-10-10 22:06:48,875 INFO L87 Difference]: Start difference. First operand 294 states and 450 transitions. Second operand has 38 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 36 states have internal predecessors, (87), 6 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 3 states have call predecessors, (9), 6 states have call successors, (9) [2024-10-10 22:06:52,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-10 22:06:56,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]