./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/max60-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/max60-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6dbb3c8dbc9ecf6e4f72a22b68126998e2267c3eb50185a59b3a9d03df64099d --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 14:39:49,963 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 14:39:50,055 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 14:39:50,059 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 14:39:50,062 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 14:39:50,090 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 14:39:50,090 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 14:39:50,091 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 14:39:50,092 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 14:39:50,095 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 14:39:50,095 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 14:39:50,095 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 14:39:50,096 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 14:39:50,096 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 14:39:50,096 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 14:39:50,097 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 14:39:50,097 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 14:39:50,097 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 14:39:50,097 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 14:39:50,097 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 14:39:50,098 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 14:39:50,100 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 14:39:50,101 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 14:39:50,101 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 14:39:50,101 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 14:39:50,101 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 14:39:50,101 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 14:39:50,102 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 14:39:50,102 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 14:39:50,102 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 14:39:50,102 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 14:39:50,102 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 14:39:50,103 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 14:39:50,103 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 14:39:50,103 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 14:39:50,103 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 14:39:50,103 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 14:39:50,104 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 14:39:50,104 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 14:39:50,105 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 14:39:50,105 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 14:39:50,106 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 14:39:50,106 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6dbb3c8dbc9ecf6e4f72a22b68126998e2267c3eb50185a59b3a9d03df64099d [2024-10-12 14:39:50,352 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 14:39:50,375 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 14:39:50,378 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 14:39:50,380 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 14:39:50,380 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 14:39:50,381 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/max60-2.i [2024-10-12 14:39:51,764 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 14:39:51,926 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 14:39:51,927 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/max60-2.i [2024-10-12 14:39:51,934 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ba05ae72/3dbfe40315ef403981b5b0b83a018391/FLAGa940fedcc [2024-10-12 14:39:51,946 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ba05ae72/3dbfe40315ef403981b5b0b83a018391 [2024-10-12 14:39:51,948 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 14:39:51,949 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 14:39:51,952 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 14:39:51,952 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 14:39:51,957 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 14:39:51,958 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 02:39:51" (1/1) ... [2024-10-12 14:39:51,961 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10056f64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:39:51, skipping insertion in model container [2024-10-12 14:39:51,961 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 02:39:51" (1/1) ... [2024-10-12 14:39:51,978 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 14:39:52,172 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/max60-2.i[1290,1303] [2024-10-12 14:39:52,182 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 14:39:52,193 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 14:39:52,223 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/max60-2.i[1290,1303] [2024-10-12 14:39:52,224 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 14:39:52,243 INFO L204 MainTranslator]: Completed translation [2024-10-12 14:39:52,244 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:39:52 WrapperNode [2024-10-12 14:39:52,244 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 14:39:52,245 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 14:39:52,246 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 14:39:52,246 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 14:39:52,253 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:39:52" (1/1) ... [2024-10-12 14:39:52,259 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:39:52" (1/1) ... [2024-10-12 14:39:52,278 INFO L138 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2024-10-12 14:39:52,278 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 14:39:52,279 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 14:39:52,279 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 14:39:52,279 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 14:39:52,289 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:39:52" (1/1) ... [2024-10-12 14:39:52,290 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:39:52" (1/1) ... [2024-10-12 14:39:52,292 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:39:52" (1/1) ... [2024-10-12 14:39:52,319 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 5 writes are split as follows [0, 5]. [2024-10-12 14:39:52,322 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:39:52" (1/1) ... [2024-10-12 14:39:52,322 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:39:52" (1/1) ... [2024-10-12 14:39:52,329 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:39:52" (1/1) ... [2024-10-12 14:39:52,335 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:39:52" (1/1) ... [2024-10-12 14:39:52,340 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:39:52" (1/1) ... [2024-10-12 14:39:52,340 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:39:52" (1/1) ... [2024-10-12 14:39:52,342 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 14:39:52,343 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 14:39:52,346 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 14:39:52,346 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 14:39:52,347 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:39:52" (1/1) ... [2024-10-12 14:39:52,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 14:39:52,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:39:52,381 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-12 14:39:52,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-12 14:39:52,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 14:39:52,434 INFO L130 BoogieDeclarations]: Found specification of procedure max [2024-10-12 14:39:52,434 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2024-10-12 14:39:52,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 14:39:52,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-12 14:39:52,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-12 14:39:52,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-12 14:39:52,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-12 14:39:52,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 14:39:52,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 14:39:52,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-12 14:39:52,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-12 14:39:52,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-12 14:39:52,514 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 14:39:52,516 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 14:39:52,672 INFO L? ?]: Removed 19 outVars from TransFormulas that were not future-live. [2024-10-12 14:39:52,673 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 14:39:52,703 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 14:39:52,707 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-12 14:39:52,707 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 02:39:52 BoogieIcfgContainer [2024-10-12 14:39:52,708 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 14:39:52,710 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 14:39:52,710 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 14:39:52,712 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 14:39:52,713 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 02:39:51" (1/3) ... [2024-10-12 14:39:52,713 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f6bb7c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 02:39:52, skipping insertion in model container [2024-10-12 14:39:52,714 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:39:52" (2/3) ... [2024-10-12 14:39:52,714 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f6bb7c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 02:39:52, skipping insertion in model container [2024-10-12 14:39:52,714 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 02:39:52" (3/3) ... [2024-10-12 14:39:52,716 INFO L112 eAbstractionObserver]: Analyzing ICFG max60-2.i [2024-10-12 14:39:52,730 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 14:39:52,730 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 14:39:52,788 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 14:39:52,795 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;@cd4e13b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 14:39:52,795 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 14:39:52,799 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:39:52,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-12 14:39:52,805 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:39:52,805 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:39:52,806 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:39:52,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:39:52,811 INFO L85 PathProgramCache]: Analyzing trace with hash 548279552, now seen corresponding path program 1 times [2024-10-12 14:39:52,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:39:52,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049357758] [2024-10-12 14:39:52,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:39:52,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:39:52,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:53,010 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-12 14:39:53,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:53,027 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-12 14:39:53,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:53,047 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-12 14:39:53,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 14:39:53,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:39:53,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049357758] [2024-10-12 14:39:53,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049357758] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:39:53,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:39:53,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 14:39:53,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169685416] [2024-10-12 14:39:53,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:39:53,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-12 14:39:53,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:39:53,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-12 14:39:53,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 14:39:53,102 INFO L87 Difference]: Start difference. First operand has 22 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (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) [2024-10-12 14:39:53,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:39:53,138 INFO L93 Difference]: Finished difference Result 42 states and 61 transitions. [2024-10-12 14:39:53,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-12 14:39:53,140 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (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 25 [2024-10-12 14:39:53,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:39:53,145 INFO L225 Difference]: With dead ends: 42 [2024-10-12 14:39:53,145 INFO L226 Difference]: Without dead ends: 20 [2024-10-12 14:39:53,148 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 14:39:53,150 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:39:53,151 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:39:53,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-10-12 14:39:53,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-10-12 14:39:53,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:39:53,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2024-10-12 14:39:53,184 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 25 [2024-10-12 14:39:53,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:39:53,185 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2024-10-12 14:39:53,185 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (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) [2024-10-12 14:39:53,186 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2024-10-12 14:39:53,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-12 14:39:53,187 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:39:53,187 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:39:53,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 14:39:53,188 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:39:53,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:39:53,189 INFO L85 PathProgramCache]: Analyzing trace with hash -419783731, now seen corresponding path program 1 times [2024-10-12 14:39:53,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:39:53,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256046773] [2024-10-12 14:39:53,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:39:53,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:39:53,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:53,301 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-12 14:39:53,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:53,340 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-12 14:39:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:53,353 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-12 14:39:53,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:53,364 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 14:39:53,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:39:53,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256046773] [2024-10-12 14:39:53,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256046773] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:39:53,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586556340] [2024-10-12 14:39:53,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:39:53,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:39:53,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:39:53,370 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:39:53,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 14:39:53,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:53,457 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-12 14:39:53,465 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:39:53,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 14:39:53,491 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 14:39:53,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586556340] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:39:53,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 14:39:53,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2024-10-12 14:39:53,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643750826] [2024-10-12 14:39:53,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:39:53,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 14:39:53,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:39:53,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 14:39:53,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-12 14:39:53,496 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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) [2024-10-12 14:39:53,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:39:53,516 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2024-10-12 14:39:53,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 14:39:53,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 25 [2024-10-12 14:39:53,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:39:53,518 INFO L225 Difference]: With dead ends: 39 [2024-10-12 14:39:53,519 INFO L226 Difference]: Without dead ends: 21 [2024-10-12 14:39:53,519 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-12 14:39:53,520 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:39:53,521 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:39:53,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-10-12 14:39:53,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-10-12 14:39:53,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:39:53,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2024-10-12 14:39:53,526 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 25 [2024-10-12 14:39:53,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:39:53,527 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2024-10-12 14:39:53,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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) [2024-10-12 14:39:53,528 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2024-10-12 14:39:53,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-12 14:39:53,530 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:39:53,531 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] [2024-10-12 14:39:53,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-12 14:39:53,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:39:53,736 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:39:53,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:39:53,737 INFO L85 PathProgramCache]: Analyzing trace with hash 836676700, now seen corresponding path program 1 times [2024-10-12 14:39:53,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:39:53,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567283264] [2024-10-12 14:39:53,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:39:53,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:39:53,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:53,871 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-12 14:39:53,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:53,898 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-12 14:39:53,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:53,908 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-12 14:39:53,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:53,920 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 14:39:53,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:39:53,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567283264] [2024-10-12 14:39:53,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567283264] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:39:53,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16953404] [2024-10-12 14:39:53,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:39:53,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:39:53,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:39:53,924 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:39:53,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 14:39:54,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:54,007 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-12 14:39:54,008 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:39:54,015 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-12 14:39:54,015 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 14:39:54,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16953404] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:39:54,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 14:39:54,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2024-10-12 14:39:54,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20623168] [2024-10-12 14:39:54,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:39:54,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 14:39:54,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:39:54,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 14:39:54,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-12 14:39:54,020 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-12 14:39:54,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:39:54,048 INFO L93 Difference]: Finished difference Result 40 states and 53 transitions. [2024-10-12 14:39:54,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 14:39:54,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-10-12 14:39:54,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:39:54,049 INFO L225 Difference]: With dead ends: 40 [2024-10-12 14:39:54,050 INFO L226 Difference]: Without dead ends: 24 [2024-10-12 14:39:54,050 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-12 14:39:54,051 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:39:54,051 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 34 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:39:54,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-10-12 14:39:54,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2024-10-12 14:39:54,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:39:54,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2024-10-12 14:39:54,060 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 26 [2024-10-12 14:39:54,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:39:54,061 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2024-10-12 14:39:54,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-12 14:39:54,061 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2024-10-12 14:39:54,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-12 14:39:54,063 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:39:54,063 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:39:54,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-12 14:39:54,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-10-12 14:39:54,264 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:39:54,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:39:54,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1099478403, now seen corresponding path program 1 times [2024-10-12 14:39:54,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:39:54,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855677007] [2024-10-12 14:39:54,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:39:54,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:39:54,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:54,367 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-12 14:39:54,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:54,383 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-12 14:39:54,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:54,398 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-12 14:39:54,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:54,429 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-12 14:39:54,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:39:54,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855677007] [2024-10-12 14:39:54,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855677007] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:39:54,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956288009] [2024-10-12 14:39:54,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:39:54,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:39:54,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:39:54,434 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:39:54,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 14:39:54,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:54,507 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-12 14:39:54,509 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:39:54,519 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-12 14:39:54,520 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 14:39:54,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956288009] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:39:54,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 14:39:54,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-10-12 14:39:54,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408942533] [2024-10-12 14:39:54,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:39:54,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 14:39:54,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:39:54,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 14:39:54,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-12 14:39:54,522 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2024-10-12 14:39:54,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:39:54,541 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2024-10-12 14:39:54,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 14:39:54,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 35 [2024-10-12 14:39:54,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:39:54,543 INFO L225 Difference]: With dead ends: 36 [2024-10-12 14:39:54,544 INFO L226 Difference]: Without dead ends: 23 [2024-10-12 14:39:54,545 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-12 14:39:54,545 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:39:54,547 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:39:54,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-12 14:39:54,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-10-12 14:39:54,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:39:54,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2024-10-12 14:39:54,554 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 35 [2024-10-12 14:39:54,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:39:54,555 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2024-10-12 14:39:54,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2024-10-12 14:39:54,556 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2024-10-12 14:39:54,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-12 14:39:54,558 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:39:54,559 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:39:54,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-12 14:39:54,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:39:54,760 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:39:54,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:39:54,760 INFO L85 PathProgramCache]: Analyzing trace with hash -189935555, now seen corresponding path program 1 times [2024-10-12 14:39:54,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:39:54,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236454602] [2024-10-12 14:39:54,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:39:54,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:39:54,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:54,831 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-12 14:39:54,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:54,842 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-12 14:39:54,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:54,850 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-12 14:39:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:54,880 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-12 14:39:54,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:39:54,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236454602] [2024-10-12 14:39:54,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236454602] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:39:54,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594871937] [2024-10-12 14:39:54,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:39:54,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:39:54,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:39:54,885 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:39:54,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 14:39:54,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:54,962 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-12 14:39:54,964 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:39:54,996 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-12 14:39:55,000 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:39:55,046 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-12 14:39:55,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594871937] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:39:55,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:39:55,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 9 [2024-10-12 14:39:55,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841238546] [2024-10-12 14:39:55,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:39:55,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-12 14:39:55,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:39:55,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-12 14:39:55,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-10-12 14:39:55,050 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-12 14:39:55,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:39:55,097 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2024-10-12 14:39:55,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-12 14:39:55,098 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 36 [2024-10-12 14:39:55,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:39:55,098 INFO L225 Difference]: With dead ends: 51 [2024-10-12 14:39:55,098 INFO L226 Difference]: Without dead ends: 31 [2024-10-12 14:39:55,099 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-10-12 14:39:55,099 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:39:55,100 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 66 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:39:55,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-10-12 14:39:55,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2024-10-12 14:39:55,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:39:55,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2024-10-12 14:39:55,105 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 36 [2024-10-12 14:39:55,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:39:55,106 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2024-10-12 14:39:55,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-12 14:39:55,106 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2024-10-12 14:39:55,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-12 14:39:55,107 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:39:55,107 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:39:55,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-12 14:39:55,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:39:55,308 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:39:55,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:39:55,308 INFO L85 PathProgramCache]: Analyzing trace with hash -822209617, now seen corresponding path program 2 times [2024-10-12 14:39:55,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:39:55,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942194159] [2024-10-12 14:39:55,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:39:55,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:39:55,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:55,376 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 14:39:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:55,383 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-12 14:39:55,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:55,391 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-12 14:39:55,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:55,398 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2024-10-12 14:39:55,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:39:55,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942194159] [2024-10-12 14:39:55,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942194159] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:39:55,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169157918] [2024-10-12 14:39:55,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 14:39:55,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:39:55,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:39:55,401 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:39:55,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-12 14:39:55,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 14:39:55,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:39:55,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-12 14:39:55,510 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:39:55,553 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-10-12 14:39:55,556 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:39:55,643 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-10-12 14:39:55,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169157918] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:39:55,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:39:55,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2024-10-12 14:39:55,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418569938] [2024-10-12 14:39:55,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:39:55,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-12 14:39:55,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:39:55,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-12 14:39:55,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-12 14:39:55,645 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-12 14:39:55,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:39:55,689 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2024-10-12 14:39:55,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-12 14:39:55,691 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2024-10-12 14:39:55,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:39:55,692 INFO L225 Difference]: With dead ends: 59 [2024-10-12 14:39:55,692 INFO L226 Difference]: Without dead ends: 36 [2024-10-12 14:39:55,693 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-12 14:39:55,693 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:39:55,694 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:39:55,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-10-12 14:39:55,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-10-12 14:39:55,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:39:55,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2024-10-12 14:39:55,703 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 48 [2024-10-12 14:39:55,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:39:55,703 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2024-10-12 14:39:55,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-12 14:39:55,704 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2024-10-12 14:39:55,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-12 14:39:55,705 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:39:55,705 INFO L215 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:39:55,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-12 14:39:55,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:39:55,906 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:39:55,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:39:55,907 INFO L85 PathProgramCache]: Analyzing trace with hash -987209395, now seen corresponding path program 3 times [2024-10-12 14:39:55,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:39:55,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242666912] [2024-10-12 14:39:55,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:39:55,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:39:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:56,171 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-12 14:39:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:56,178 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-12 14:39:56,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:56,187 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-12 14:39:56,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:56,196 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-10-12 14:39:56,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:39:56,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242666912] [2024-10-12 14:39:56,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242666912] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:39:56,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157946847] [2024-10-12 14:39:56,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 14:39:56,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:39:56,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:39:56,202 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:39:56,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-12 14:39:56,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-12 14:39:56,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:39:56,302 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-12 14:39:56,307 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:39:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 40 proven. 3 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-10-12 14:39:56,349 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:39:56,403 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-10-12 14:39:56,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157946847] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:39:56,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:39:56,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2024-10-12 14:39:56,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114844998] [2024-10-12 14:39:56,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:39:56,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-12 14:39:56,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:39:56,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-12 14:39:56,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2024-10-12 14:39:56,406 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 14:39:56,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:39:56,449 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2024-10-12 14:39:56,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-12 14:39:56,450 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2024-10-12 14:39:56,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:39:56,451 INFO L225 Difference]: With dead ends: 65 [2024-10-12 14:39:56,451 INFO L226 Difference]: Without dead ends: 41 [2024-10-12 14:39:56,452 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2024-10-12 14:39:56,452 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:39:56,453 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 125 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:39:56,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-10-12 14:39:56,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-10-12 14:39:56,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:39:56,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2024-10-12 14:39:56,458 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 55 [2024-10-12 14:39:56,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:39:56,458 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2024-10-12 14:39:56,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 14:39:56,458 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2024-10-12 14:39:56,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-10-12 14:39:56,459 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:39:56,459 INFO L215 NwaCegarLoop]: trace histogram [11, 6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:39:56,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-12 14:39:56,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:39:56,660 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:39:56,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:39:56,661 INFO L85 PathProgramCache]: Analyzing trace with hash 819371676, now seen corresponding path program 4 times [2024-10-12 14:39:56,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:39:56,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335295963] [2024-10-12 14:39:56,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:39:56,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:39:56,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:56,946 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-12 14:39:56,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:56,956 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-12 14:39:56,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:56,962 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-12 14:39:56,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:56,968 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2024-10-12 14:39:56,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:39:56,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335295963] [2024-10-12 14:39:56,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335295963] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:39:56,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278549926] [2024-10-12 14:39:56,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 14:39:56,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:39:56,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:39:56,971 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:39:56,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-12 14:39:57,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 14:39:57,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:39:57,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-12 14:39:57,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:39:57,135 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 57 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-10-12 14:39:57,138 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:39:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 19 proven. 24 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2024-10-12 14:39:57,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278549926] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:39:57,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:39:57,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2024-10-12 14:39:57,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438413477] [2024-10-12 14:39:57,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:39:57,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-12 14:39:57,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:39:57,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-12 14:39:57,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2024-10-12 14:39:57,203 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 14:39:57,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:39:57,275 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2024-10-12 14:39:57,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-12 14:39:57,276 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 60 [2024-10-12 14:39:57,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:39:57,277 INFO L225 Difference]: With dead ends: 82 [2024-10-12 14:39:57,277 INFO L226 Difference]: Without dead ends: 54 [2024-10-12 14:39:57,277 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2024-10-12 14:39:57,278 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 17 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:39:57,279 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 101 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:39:57,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-12 14:39:57,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-10-12 14:39:57,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:39:57,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2024-10-12 14:39:57,286 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 60 [2024-10-12 14:39:57,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:39:57,286 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2024-10-12 14:39:57,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 14:39:57,286 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2024-10-12 14:39:57,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-10-12 14:39:57,287 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:39:57,287 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 18, 12, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:39:57,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-12 14:39:57,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:39:57,492 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:39:57,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:39:57,492 INFO L85 PathProgramCache]: Analyzing trace with hash 822741869, now seen corresponding path program 5 times [2024-10-12 14:39:57,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:39:57,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176437331] [2024-10-12 14:39:57,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:39:57,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:39:57,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:57,810 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-12 14:39:57,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:57,836 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-12 14:39:57,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:57,848 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-10-12 14:39:57,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:57,858 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2024-10-12 14:39:57,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:39:57,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176437331] [2024-10-12 14:39:57,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176437331] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:39:57,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817227757] [2024-10-12 14:39:57,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-12 14:39:57,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:39:57,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:39:57,861 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:39:57,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-12 14:39:58,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-10-12 14:39:58,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:39:58,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-12 14:39:58,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:39:58,584 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2024-10-12 14:39:58,584 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:39:58,753 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2024-10-12 14:39:58,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817227757] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:39:58,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:39:58,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2024-10-12 14:39:58,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594876292] [2024-10-12 14:39:58,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:39:58,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-12 14:39:58,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:39:58,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-12 14:39:58,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2024-10-12 14:39:58,756 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 14:39:58,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:39:58,855 INFO L93 Difference]: Finished difference Result 119 states and 158 transitions. [2024-10-12 14:39:58,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-12 14:39:58,855 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 97 [2024-10-12 14:39:58,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:39:58,856 INFO L225 Difference]: With dead ends: 119 [2024-10-12 14:39:58,856 INFO L226 Difference]: Without dead ends: 79 [2024-10-12 14:39:58,857 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2024-10-12 14:39:58,858 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 41 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:39:58,858 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 173 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:39:58,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-10-12 14:39:58,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2024-10-12 14:39:58,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 74 states have internal predecessors, (91), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:39:58,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2024-10-12 14:39:58,866 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 97 [2024-10-12 14:39:58,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:39:58,866 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2024-10-12 14:39:58,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 14:39:58,868 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2024-10-12 14:39:58,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2024-10-12 14:39:58,870 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:39:58,870 INFO L215 NwaCegarLoop]: trace histogram [42, 42, 42, 13, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:39:58,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-12 14:39:59,071 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-10-12 14:39:59,072 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:39:59,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:39:59,072 INFO L85 PathProgramCache]: Analyzing trace with hash -335114884, now seen corresponding path program 6 times [2024-10-12 14:39:59,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:39:59,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996567467] [2024-10-12 14:39:59,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:39:59,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:39:59,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:59,512 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-12 14:39:59,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:59,532 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-12 14:39:59,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:59,550 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2024-10-12 14:39:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:39:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2833 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 2742 trivial. 0 not checked. [2024-10-12 14:39:59,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:39:59,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996567467] [2024-10-12 14:39:59,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996567467] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:39:59,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633614173] [2024-10-12 14:39:59,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-12 14:39:59,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:39:59,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:39:59,572 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:39:59,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-12 14:39:59,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-10-12 14:39:59,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:39:59,864 INFO L255 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-12 14:39:59,867 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:39:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2833 backedges. 1240 proven. 21 refuted. 0 times theorem prover too weak. 1572 trivial. 0 not checked. [2024-10-12 14:39:59,972 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:40:00,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2833 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2024-10-12 14:40:00,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633614173] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:40:00,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:40:00,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2024-10-12 14:40:00,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055952608] [2024-10-12 14:40:00,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:40:00,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-12 14:40:00,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:40:00,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-12 14:40:00,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2024-10-12 14:40:00,137 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 14:40:00,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:40:00,202 INFO L93 Difference]: Finished difference Result 152 states and 196 transitions. [2024-10-12 14:40:00,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-12 14:40:00,203 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 170 [2024-10-12 14:40:00,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:40:00,204 INFO L225 Difference]: With dead ends: 152 [2024-10-12 14:40:00,207 INFO L226 Difference]: Without dead ends: 88 [2024-10-12 14:40:00,208 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2024-10-12 14:40:00,209 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:40:00,209 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 125 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:40:00,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-10-12 14:40:00,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-10-12 14:40:00,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.2048192771084338) internal successors, (100), 83 states have internal predecessors, (100), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:40:00,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2024-10-12 14:40:00,220 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 170 [2024-10-12 14:40:00,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:40:00,223 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2024-10-12 14:40:00,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 14:40:00,224 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2024-10-12 14:40:00,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2024-10-12 14:40:00,226 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:40:00,226 INFO L215 NwaCegarLoop]: trace histogram [42, 42, 42, 14, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:40:00,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-12 14:40:00,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-12 14:40:00,427 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:40:00,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:40:00,427 INFO L85 PathProgramCache]: Analyzing trace with hash -941367859, now seen corresponding path program 7 times [2024-10-12 14:40:00,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:40:00,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320511991] [2024-10-12 14:40:00,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:40:00,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:40:00,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:40:00,914 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-12 14:40:00,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:40:00,931 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-10-12 14:40:00,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:40:00,949 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2024-10-12 14:40:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:40:00,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2931 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 2826 trivial. 0 not checked. [2024-10-12 14:40:00,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:40:00,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320511991] [2024-10-12 14:40:00,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320511991] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:40:00,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922060278] [2024-10-12 14:40:00,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-12 14:40:00,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:40:00,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:40:00,969 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:40:00,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-12 14:40:01,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:40:01,218 INFO L255 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-12 14:40:01,221 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:40:01,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2931 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 2826 trivial. 0 not checked. [2024-10-12 14:40:01,267 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:40:01,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2931 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 2826 trivial. 0 not checked. [2024-10-12 14:40:01,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922060278] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:40:01,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:40:01,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 33 [2024-10-12 14:40:01,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495530599] [2024-10-12 14:40:01,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:40:01,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-12 14:40:01,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:40:01,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-12 14:40:01,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2024-10-12 14:40:01,632 INFO L87 Difference]: Start difference. First operand 88 states and 106 transitions. Second operand has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 33 states have internal predecessors, (55), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-12 14:40:01,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:40:01,679 INFO L93 Difference]: Finished difference Result 176 states and 227 transitions. [2024-10-12 14:40:01,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-12 14:40:01,679 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 33 states have internal predecessors, (55), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 179 [2024-10-12 14:40:01,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:40:01,681 INFO L225 Difference]: With dead ends: 176 [2024-10-12 14:40:01,681 INFO L226 Difference]: Without dead ends: 104 [2024-10-12 14:40:01,682 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2024-10-12 14:40:01,684 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:40:01,684 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:40:01,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-10-12 14:40:01,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2024-10-12 14:40:01,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.1717171717171717) internal successors, (116), 99 states have internal predecessors, (116), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:40:01,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 122 transitions. [2024-10-12 14:40:01,698 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 122 transitions. Word has length 179 [2024-10-12 14:40:01,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:40:01,698 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 122 transitions. [2024-10-12 14:40:01,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 33 states have internal predecessors, (55), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-12 14:40:01,699 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 122 transitions. [2024-10-12 14:40:01,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2024-10-12 14:40:01,700 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:40:01,700 INFO L215 NwaCegarLoop]: trace histogram [42, 42, 42, 30, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:40:01,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-12 14:40:01,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-12 14:40:01,901 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:40:01,901 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:40:01,901 INFO L85 PathProgramCache]: Analyzing trace with hash 418155725, now seen corresponding path program 8 times [2024-10-12 14:40:01,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:40:01,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583252635] [2024-10-12 14:40:01,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:40:01,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:40:01,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:40:03,018 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-10-12 14:40:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:40:03,033 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-10-12 14:40:03,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:40:03,048 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2024-10-12 14:40:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:40:03,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3291 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 2826 trivial. 0 not checked. [2024-10-12 14:40:03,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:40:03,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583252635] [2024-10-12 14:40:03,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583252635] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:40:03,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055433439] [2024-10-12 14:40:03,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 14:40:03,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:40:03,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:40:03,067 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:40:03,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-12 14:40:03,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 14:40:03,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:40:03,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-12 14:40:03,350 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:40:03,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3291 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 2826 trivial. 0 not checked. [2024-10-12 14:40:03,414 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:40:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3291 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 2826 trivial. 0 not checked. [2024-10-12 14:40:04,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055433439] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:40:04,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:40:04,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 33] total 63 [2024-10-12 14:40:04,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964404048] [2024-10-12 14:40:04,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:40:04,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-10-12 14:40:04,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:40:04,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-10-12 14:40:04,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2024-10-12 14:40:04,670 INFO L87 Difference]: Start difference. First operand 104 states and 122 transitions. Second operand has 63 states, 63 states have (on average 1.3650793650793651) internal successors, (86), 63 states have internal predecessors, (86), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-12 14:40:04,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:40:04,747 INFO L93 Difference]: Finished difference Result 206 states and 271 transitions. [2024-10-12 14:40:04,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-10-12 14:40:04,747 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.3650793650793651) internal successors, (86), 63 states have internal predecessors, (86), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 195 [2024-10-12 14:40:04,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:40:04,750 INFO L225 Difference]: With dead ends: 206 [2024-10-12 14:40:04,750 INFO L226 Difference]: Without dead ends: 134 [2024-10-12 14:40:04,752 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 363 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2024-10-12 14:40:04,753 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:40:04,753 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:40:04,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-10-12 14:40:04,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2024-10-12 14:40:04,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.1317829457364341) internal successors, (146), 129 states have internal predecessors, (146), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:40:04,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 152 transitions. [2024-10-12 14:40:04,768 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 152 transitions. Word has length 195 [2024-10-12 14:40:04,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:40:04,769 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 152 transitions. [2024-10-12 14:40:04,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.3650793650793651) internal successors, (86), 63 states have internal predecessors, (86), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-12 14:40:04,769 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 152 transitions. [2024-10-12 14:40:04,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2024-10-12 14:40:04,771 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:40:04,771 INFO L215 NwaCegarLoop]: trace histogram [60, 42, 42, 42, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:40:04,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-12 14:40:04,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-12 14:40:04,976 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:40:04,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:40:04,976 INFO L85 PathProgramCache]: Analyzing trace with hash -520177427, now seen corresponding path program 9 times [2024-10-12 14:40:04,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:40:04,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117299684] [2024-10-12 14:40:04,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:40:04,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:40:05,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:40:05,596 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-10-12 14:40:05,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:40:05,808 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-10-12 14:40:05,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:40:05,841 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2024-10-12 14:40:05,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:40:05,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 3131 trivial. 0 not checked. [2024-10-12 14:40:05,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:40:05,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117299684] [2024-10-12 14:40:05,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117299684] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:40:05,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379487725] [2024-10-12 14:40:05,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 14:40:05,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:40:05,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:40:05,861 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:40:05,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-12 14:40:06,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-10-12 14:40:06,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:40:06,899 INFO L255 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-12 14:40:06,903 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:40:07,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 1240 proven. 105 refuted. 0 times theorem prover too weak. 3311 trivial. 0 not checked. [2024-10-12 14:40:07,109 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:40:07,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 4551 trivial. 0 not checked. [2024-10-12 14:40:07,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379487725] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:40:07,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:40:07,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 47 [2024-10-12 14:40:07,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738603532] [2024-10-12 14:40:07,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:40:07,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-10-12 14:40:07,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:40:07,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-10-12 14:40:07,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=631, Invalid=1531, Unknown=0, NotChecked=0, Total=2162 [2024-10-12 14:40:07,476 INFO L87 Difference]: Start difference. First operand 134 states and 152 transitions. Second operand has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 14:40:07,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:40:07,581 INFO L93 Difference]: Finished difference Result 225 states and 281 transitions. [2024-10-12 14:40:07,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-10-12 14:40:07,581 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 225 [2024-10-12 14:40:07,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:40:07,583 INFO L225 Difference]: With dead ends: 225 [2024-10-12 14:40:07,583 INFO L226 Difference]: Without dead ends: 155 [2024-10-12 14:40:07,584 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=631, Invalid=1531, Unknown=0, NotChecked=0, Total=2162 [2024-10-12 14:40:07,584 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 56 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:40:07,585 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 93 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:40:07,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-10-12 14:40:07,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 153. [2024-10-12 14:40:07,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.1216216216216217) internal successors, (166), 148 states have internal predecessors, (166), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:40:07,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 172 transitions. [2024-10-12 14:40:07,594 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 172 transitions. Word has length 225 [2024-10-12 14:40:07,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:40:07,594 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 172 transitions. [2024-10-12 14:40:07,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 14:40:07,595 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 172 transitions. [2024-10-12 14:40:07,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2024-10-12 14:40:07,597 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:40:07,597 INFO L215 NwaCegarLoop]: trace histogram [60, 45, 45, 45, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:40:07,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-12 14:40:07,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-12 14:40:07,802 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:40:07,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:40:07,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1877871732, now seen corresponding path program 10 times [2024-10-12 14:40:07,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:40:07,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708724956] [2024-10-12 14:40:07,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:40:07,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:40:07,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:40:08,402 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-10-12 14:40:08,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:40:08,620 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2024-10-12 14:40:08,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:40:08,637 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2024-10-12 14:40:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:40:08,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5412 backedges. 0 proven. 1746 refuted. 0 times theorem prover too weak. 3666 trivial. 0 not checked. [2024-10-12 14:40:08,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:40:08,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708724956] [2024-10-12 14:40:08,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708724956] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:40:08,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079976250] [2024-10-12 14:40:08,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 14:40:08,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:40:08,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:40:08,660 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:40:08,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-12 14:40:09,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 14:40:09,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:40:09,024 INFO L255 TraceCheckSpWp]: Trace formula consists of 1411 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-12 14:40:09,029 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:40:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5412 backedges. 1414 proven. 330 refuted. 0 times theorem prover too weak. 3668 trivial. 0 not checked. [2024-10-12 14:40:09,108 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:40:09,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5412 backedges. 0 proven. 1746 refuted. 0 times theorem prover too weak. 3666 trivial. 0 not checked. [2024-10-12 14:40:09,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079976250] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:40:09,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:40:09,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 34 [2024-10-12 14:40:09,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012122776] [2024-10-12 14:40:09,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:40:09,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-12 14:40:09,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:40:09,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-12 14:40:09,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2024-10-12 14:40:09,471 INFO L87 Difference]: Start difference. First operand 153 states and 172 transitions. Second operand has 34 states, 34 states have (on average 3.4705882352941178) internal successors, (118), 34 states have internal predecessors, (118), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-12 14:40:09,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:40:09,603 INFO L93 Difference]: Finished difference Result 293 states and 366 transitions. [2024-10-12 14:40:09,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-10-12 14:40:09,604 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.4705882352941178) internal successors, (118), 34 states have internal predecessors, (118), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 250 [2024-10-12 14:40:09,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:40:09,606 INFO L225 Difference]: With dead ends: 293 [2024-10-12 14:40:09,606 INFO L226 Difference]: Without dead ends: 204 [2024-10-12 14:40:09,606 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2024-10-12 14:40:09,607 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 117 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:40:09,607 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 109 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:40:09,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-10-12 14:40:09,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2024-10-12 14:40:09,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 199 states have (on average 1.1758793969849246) internal successors, (234), 199 states have internal predecessors, (234), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:40:09,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 240 transitions. [2024-10-12 14:40:09,640 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 240 transitions. Word has length 250 [2024-10-12 14:40:09,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:40:09,640 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 240 transitions. [2024-10-12 14:40:09,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.4705882352941178) internal successors, (118), 34 states have internal predecessors, (118), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-12 14:40:09,641 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 240 transitions. [2024-10-12 14:40:09,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2024-10-12 14:40:09,647 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:40:09,647 INFO L215 NwaCegarLoop]: trace histogram [96, 96, 96, 60, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:40:09,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-12 14:40:09,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-12 14:40:09,848 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:40:09,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:40:09,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1722303949, now seen corresponding path program 11 times [2024-10-12 14:40:09,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:40:09,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673965083] [2024-10-12 14:40:09,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:40:09,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:40:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:40:11,074 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-10-12 14:40:11,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:40:11,803 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2024-10-12 14:40:11,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:40:11,829 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 299 [2024-10-12 14:40:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:40:11,859 INFO L134 CoverageAnalysis]: Checked inductivity of 16275 backedges. 0 proven. 7798 refuted. 0 times theorem prover too weak. 8477 trivial. 0 not checked. [2024-10-12 14:40:11,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:40:11,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673965083] [2024-10-12 14:40:11,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673965083] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:40:11,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362458231] [2024-10-12 14:40:11,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-12 14:40:11,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:40:11,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:40:11,861 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:40:11,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process