./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9c0fb6a0d32b99c9a776859d2bc15d9177dc584955a2c1baa8ac133e976f40f7 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 14:25:43,771 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 14:25:43,853 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 14:25:43,859 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 14:25:43,860 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 14:25:43,891 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 14:25:43,894 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 14:25:43,894 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 14:25:43,895 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 14:25:43,896 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 14:25:43,896 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 14:25:43,897 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 14:25:43,897 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 14:25:43,898 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 14:25:43,901 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 14:25:43,901 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 14:25:43,901 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 14:25:43,902 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 14:25:43,902 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 14:25:43,902 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 14:25:43,903 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 14:25:43,903 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 14:25:43,907 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 14:25:43,908 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 14:25:43,908 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 14:25:43,908 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 14:25:43,908 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 14:25:43,908 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 14:25:43,909 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 14:25:43,909 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 14:25:43,909 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 14:25:43,909 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 14:25:43,910 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 14:25:43,910 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 14:25:43,911 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 14:25:43,912 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 14:25:43,912 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 14:25:43,912 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 14:25:43,913 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 14:25:43,913 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 14:25:43,914 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 14:25:43,914 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 14:25:43,915 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9c0fb6a0d32b99c9a776859d2bc15d9177dc584955a2c1baa8ac133e976f40f7 [2024-11-18 14:25:44,174 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 14:25:44,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 14:25:44,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 14:25:44,206 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 14:25:44,207 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 14:25:44,208 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c [2024-11-18 14:25:45,704 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 14:25:45,884 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 14:25:45,886 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c [2024-11-18 14:25:45,893 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c5133d76/fece5d5414644ba9a76bec981e02044e/FLAG309dc6665 [2024-11-18 14:25:46,285 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c5133d76/fece5d5414644ba9a76bec981e02044e [2024-11-18 14:25:46,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 14:25:46,288 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 14:25:46,289 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 14:25:46,290 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 14:25:46,295 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 14:25:46,296 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 02:25:46" (1/1) ... [2024-11-18 14:25:46,297 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40af53d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:25:46, skipping insertion in model container [2024-11-18 14:25:46,297 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 02:25:46" (1/1) ... [2024-11-18 14:25:46,316 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 14:25:46,507 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c[548,561] [2024-11-18 14:25:46,511 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 14:25:46,521 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 14:25:46,533 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c[548,561] [2024-11-18 14:25:46,534 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 14:25:46,552 INFO L204 MainTranslator]: Completed translation [2024-11-18 14:25:46,552 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:25:46 WrapperNode [2024-11-18 14:25:46,552 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 14:25:46,553 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 14:25:46,553 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 14:25:46,553 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 14:25:46,560 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:25:46" (1/1) ... [2024-11-18 14:25:46,566 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:25:46" (1/1) ... [2024-11-18 14:25:46,581 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2024-11-18 14:25:46,581 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 14:25:46,582 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 14:25:46,582 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 14:25:46,582 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 14:25:46,592 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:25:46" (1/1) ... [2024-11-18 14:25:46,592 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:25:46" (1/1) ... [2024-11-18 14:25:46,593 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:25:46" (1/1) ... [2024-11-18 14:25:46,606 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-18 14:25:46,607 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:25:46" (1/1) ... [2024-11-18 14:25:46,607 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:25:46" (1/1) ... [2024-11-18 14:25:46,613 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:25:46" (1/1) ... [2024-11-18 14:25:46,619 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:25:46" (1/1) ... [2024-11-18 14:25:46,620 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:25:46" (1/1) ... [2024-11-18 14:25:46,621 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:25:46" (1/1) ... [2024-11-18 14:25:46,622 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 14:25:46,623 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 14:25:46,623 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 14:25:46,623 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 14:25:46,624 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:25:46" (1/1) ... [2024-11-18 14:25:46,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 14:25:46,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:25:46,667 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) [2024-11-18 14:25:46,677 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 [2024-11-18 14:25:46,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 14:25:46,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 14:25:46,730 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2024-11-18 14:25:46,730 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2024-11-18 14:25:46,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 14:25:46,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 14:25:46,730 INFO L130 BoogieDeclarations]: Found specification of procedure id [2024-11-18 14:25:46,730 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2024-11-18 14:25:46,789 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 14:25:46,791 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 14:25:46,899 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-18 14:25:46,900 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 14:25:46,911 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 14:25:46,911 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-18 14:25:46,912 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:25:46 BoogieIcfgContainer [2024-11-18 14:25:46,912 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 14:25:46,914 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 14:25:46,914 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 14:25:46,918 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 14:25:46,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 02:25:46" (1/3) ... [2024-11-18 14:25:46,919 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49291517 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 02:25:46, skipping insertion in model container [2024-11-18 14:25:46,919 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:25:46" (2/3) ... [2024-11-18 14:25:46,919 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49291517 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 02:25:46, skipping insertion in model container [2024-11-18 14:25:46,919 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:25:46" (3/3) ... [2024-11-18 14:25:46,921 INFO L112 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-2.c [2024-11-18 14:25:46,938 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 14:25:46,938 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 14:25:47,011 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 14:25:47,022 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;@516ce00e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 14:25:47,023 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 14:25:47,027 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 14:25:47,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-18 14:25:47,038 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:25:47,039 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:25:47,040 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:25:47,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:25:47,046 INFO L85 PathProgramCache]: Analyzing trace with hash -214835512, now seen corresponding path program 1 times [2024-11-18 14:25:47,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:25:47,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689116404] [2024-11-18 14:25:47,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:25:47,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:25:47,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:25:47,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 14:25:47,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:25:47,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689116404] [2024-11-18 14:25:47,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689116404] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:25:47,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 14:25:47,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-18 14:25:47,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296371963] [2024-11-18 14:25:47,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:25:47,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-18 14:25:47,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:25:47,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-18 14:25:47,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-18 14:25:47,429 INFO L87 Difference]: Start difference. First operand has 22 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-18 14:25:47,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:25:47,502 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2024-11-18 14:25:47,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-18 14:25:47,505 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-11-18 14:25:47,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:25:47,510 INFO L225 Difference]: With dead ends: 31 [2024-11-18 14:25:47,511 INFO L226 Difference]: Without dead ends: 21 [2024-11-18 14:25:47,513 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-18 14:25:47,516 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 14:25:47,517 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 67 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 14:25:47,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-18 14:25:47,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-18 14:25:47,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-18 14:25:47,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2024-11-18 14:25:47,553 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2024-11-18 14:25:47,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:25:47,554 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2024-11-18 14:25:47,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-18 14:25:47,555 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2024-11-18 14:25:47,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-18 14:25:47,557 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:25:47,557 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:25:47,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-18 14:25:47,558 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:25:47,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:25:47,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1901198062, now seen corresponding path program 1 times [2024-11-18 14:25:47,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:25:47,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223773012] [2024-11-18 14:25:47,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:25:47,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:25:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:25:47,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 14:25:47,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:25:47,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223773012] [2024-11-18 14:25:47,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223773012] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:25:47,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 14:25:47,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-18 14:25:47,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092377656] [2024-11-18 14:25:47,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:25:47,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-18 14:25:47,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:25:47,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-18 14:25:47,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-18 14:25:47,732 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 14:25:47,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:25:47,833 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2024-11-18 14:25:47,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-18 14:25:47,834 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2024-11-18 14:25:47,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:25:47,836 INFO L225 Difference]: With dead ends: 30 [2024-11-18 14:25:47,836 INFO L226 Difference]: Without dead ends: 26 [2024-11-18 14:25:47,837 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-18 14:25:47,840 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 10 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:25:47,841 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 76 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:25:47,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-18 14:25:47,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2024-11-18 14:25:47,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-18 14:25:47,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2024-11-18 14:25:47,852 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2024-11-18 14:25:47,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:25:47,852 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2024-11-18 14:25:47,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 14:25:47,853 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2024-11-18 14:25:47,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-18 14:25:47,854 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:25:47,855 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:25:47,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-18 14:25:47,855 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:25:47,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:25:47,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1593669520, now seen corresponding path program 1 times [2024-11-18 14:25:47,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:25:47,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024937632] [2024-11-18 14:25:47,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:25:47,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:25:47,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:25:48,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-18 14:25:48,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:25:48,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024937632] [2024-11-18 14:25:48,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024937632] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:25:48,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503190392] [2024-11-18 14:25:48,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:25:48,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:25:48,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:25:48,074 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) [2024-11-18 14:25:48,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-18 14:25:48,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:25:48,129 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-18 14:25:48,135 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:25:48,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-18 14:25:48,227 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:25:48,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-18 14:25:48,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503190392] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:25:48,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:25:48,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 12 [2024-11-18 14:25:48,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344073522] [2024-11-18 14:25:48,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:25:48,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-18 14:25:48,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:25:48,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-18 14:25:48,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-18 14:25:48,610 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 12 states, 10 states have (on average 2.2) internal successors, (22), 12 states have internal predecessors, (22), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-18 14:25:48,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:25:48,711 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2024-11-18 14:25:48,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-18 14:25:48,712 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 12 states have internal predecessors, (22), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) Word has length 22 [2024-11-18 14:25:48,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:25:48,713 INFO L225 Difference]: With dead ends: 36 [2024-11-18 14:25:48,713 INFO L226 Difference]: Without dead ends: 32 [2024-11-18 14:25:48,714 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-18 14:25:48,715 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:25:48,717 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 67 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:25:48,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-18 14:25:48,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2024-11-18 14:25:48,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-18 14:25:48,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2024-11-18 14:25:48,730 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2024-11-18 14:25:48,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:25:48,731 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2024-11-18 14:25:48,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 12 states have internal predecessors, (22), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-18 14:25:48,731 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2024-11-18 14:25:48,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-18 14:25:48,733 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:25:48,733 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:25:48,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-18 14:25:48,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:25:48,938 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:25:48,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:25:48,939 INFO L85 PathProgramCache]: Analyzing trace with hash 545848374, now seen corresponding path program 1 times [2024-11-18 14:25:48,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:25:48,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742473943] [2024-11-18 14:25:48,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:25:48,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:25:48,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:25:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-18 14:25:49,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:25:49,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742473943] [2024-11-18 14:25:49,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742473943] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:25:49,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466849550] [2024-11-18 14:25:49,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:25:49,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:25:49,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:25:49,139 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) [2024-11-18 14:25:49,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-18 14:25:49,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:25:49,189 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-18 14:25:49,191 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:25:49,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-18 14:25:49,249 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:25:49,856 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-18 14:25:49,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466849550] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:25:49,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:25:49,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 14 [2024-11-18 14:25:49,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791374307] [2024-11-18 14:25:49,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:25:49,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-18 14:25:49,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:25:49,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-18 14:25:49,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-18 14:25:49,858 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 14 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (8), 4 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-18 14:25:49,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:25:49,957 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2024-11-18 14:25:49,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-18 14:25:49,958 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 14 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (8), 4 states have call predecessors, (8), 7 states have call successors, (8) Word has length 28 [2024-11-18 14:25:49,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:25:49,959 INFO L225 Difference]: With dead ends: 42 [2024-11-18 14:25:49,959 INFO L226 Difference]: Without dead ends: 38 [2024-11-18 14:25:49,960 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-11-18 14:25:49,961 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 22 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:25:49,961 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 100 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:25:49,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-18 14:25:49,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2024-11-18 14:25:49,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-18 14:25:49,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2024-11-18 14:25:49,969 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 28 [2024-11-18 14:25:49,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:25:49,969 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2024-11-18 14:25:49,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 14 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (8), 4 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-18 14:25:49,970 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2024-11-18 14:25:49,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-18 14:25:49,972 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:25:49,972 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:25:49,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-18 14:25:50,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-18 14:25:50,177 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:25:50,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:25:50,178 INFO L85 PathProgramCache]: Analyzing trace with hash 120771672, now seen corresponding path program 2 times [2024-11-18 14:25:50,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:25:50,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707641826] [2024-11-18 14:25:50,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:25:50,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:25:50,203 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:25:50,203 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:25:50,387 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-18 14:25:50,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:25:50,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707641826] [2024-11-18 14:25:50,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707641826] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:25:50,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622537798] [2024-11-18 14:25:50,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:25:50,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:25:50,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:25:50,390 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) [2024-11-18 14:25:50,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-18 14:25:50,435 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:25:50,435 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:25:50,436 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-18 14:25:50,438 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:25:50,497 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-18 14:25:50,498 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:25:51,279 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 14:25:51,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622537798] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:25:51,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:25:51,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 17 [2024-11-18 14:25:51,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936629219] [2024-11-18 14:25:51,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:25:51,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-18 14:25:51,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:25:51,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-18 14:25:51,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2024-11-18 14:25:51,284 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 17 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 6 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-18 14:25:51,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:25:51,421 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2024-11-18 14:25:51,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-18 14:25:51,422 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 17 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 6 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) Word has length 34 [2024-11-18 14:25:51,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:25:51,423 INFO L225 Difference]: With dead ends: 48 [2024-11-18 14:25:51,423 INFO L226 Difference]: Without dead ends: 44 [2024-11-18 14:25:51,424 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2024-11-18 14:25:51,424 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 22 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:25:51,425 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 147 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:25:51,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-18 14:25:51,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 33. [2024-11-18 14:25:51,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-18 14:25:51,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2024-11-18 14:25:51,431 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 34 [2024-11-18 14:25:51,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:25:51,431 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2024-11-18 14:25:51,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 17 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 6 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-18 14:25:51,432 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2024-11-18 14:25:51,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-18 14:25:51,433 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:25:51,433 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:25:51,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-18 14:25:51,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:25:51,634 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:25:51,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:25:51,635 INFO L85 PathProgramCache]: Analyzing trace with hash -644488834, now seen corresponding path program 2 times [2024-11-18 14:25:51,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:25:51,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717480514] [2024-11-18 14:25:51,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:25:51,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:25:51,650 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:25:51,651 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:25:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-18 14:25:51,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:25:51,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717480514] [2024-11-18 14:25:51,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717480514] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:25:51,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439949655] [2024-11-18 14:25:51,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:25:51,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:25:51,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:25:51,906 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) [2024-11-18 14:25:51,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-18 14:25:51,967 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:25:51,968 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:25:51,969 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-18 14:25:51,971 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:25:52,001 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-18 14:25:52,001 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:25:52,201 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-18 14:25:52,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439949655] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:25:52,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:25:52,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 15 [2024-11-18 14:25:52,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734230745] [2024-11-18 14:25:52,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:25:52,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-18 14:25:52,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:25:52,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-18 14:25:52,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2024-11-18 14:25:52,205 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-18 14:25:52,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:25:52,289 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2024-11-18 14:25:52,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-18 14:25:52,290 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40 [2024-11-18 14:25:52,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:25:52,291 INFO L225 Difference]: With dead ends: 54 [2024-11-18 14:25:52,291 INFO L226 Difference]: Without dead ends: 50 [2024-11-18 14:25:52,291 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2024-11-18 14:25:52,292 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:25:52,292 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 398 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:25:52,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-18 14:25:52,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2024-11-18 14:25:52,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-18 14:25:52,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2024-11-18 14:25:52,310 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 40 [2024-11-18 14:25:52,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:25:52,311 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2024-11-18 14:25:52,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-18 14:25:52,311 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2024-11-18 14:25:52,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-18 14:25:52,312 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:25:52,312 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:25:52,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-18 14:25:52,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:25:52,513 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:25:52,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:25:52,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1812460832, now seen corresponding path program 3 times [2024-11-18 14:25:52,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:25:52,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478107716] [2024-11-18 14:25:52,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:25:52,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:25:52,535 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-18 14:25:52,535 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:25:52,706 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-18 14:25:52,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:25:52,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478107716] [2024-11-18 14:25:52,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478107716] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:25:52,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159759261] [2024-11-18 14:25:52,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:25:52,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:25:52,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:25:52,709 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) [2024-11-18 14:25:52,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-18 14:25:52,774 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-18 14:25:52,774 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:25:52,776 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-18 14:25:52,780 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:25:52,854 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-18 14:25:52,854 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-18 14:25:52,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159759261] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:25:52,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-18 14:25:52,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [14] total 15 [2024-11-18 14:25:52,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657349207] [2024-11-18 14:25:52,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:25:52,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-18 14:25:52,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:25:52,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-18 14:25:52,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2024-11-18 14:25:52,856 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-18 14:25:52,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:25:52,987 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2024-11-18 14:25:52,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-18 14:25:52,988 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2024-11-18 14:25:52,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:25:52,989 INFO L225 Difference]: With dead ends: 60 [2024-11-18 14:25:52,989 INFO L226 Difference]: Without dead ends: 36 [2024-11-18 14:25:52,989 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2024-11-18 14:25:52,990 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:25:52,990 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 186 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:25:52,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-18 14:25:53,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-18 14:25:53,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-18 14:25:53,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2024-11-18 14:25:53,003 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 46 [2024-11-18 14:25:53,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:25:53,003 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2024-11-18 14:25:53,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-18 14:25:53,004 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2024-11-18 14:25:53,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-18 14:25:53,008 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:25:53,008 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:25:53,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-18 14:25:53,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:25:53,209 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:25:53,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:25:53,209 INFO L85 PathProgramCache]: Analyzing trace with hash -866735418, now seen corresponding path program 3 times [2024-11-18 14:25:53,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:25:53,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952717720] [2024-11-18 14:25:53,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:25:53,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:25:53,224 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-18 14:25:53,224 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:25:53,443 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-18 14:25:53,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:25:53,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952717720] [2024-11-18 14:25:53,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952717720] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:25:53,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 14:25:53,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-11-18 14:25:53,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015373467] [2024-11-18 14:25:53,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:25:53,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-18 14:25:53,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:25:53,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-18 14:25:53,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-18 14:25:53,446 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 8 states have return successors, (8), 8 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-18 14:25:53,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:25:53,551 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2024-11-18 14:25:53,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-18 14:25:53,551 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 8 states have return successors, (8), 8 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2024-11-18 14:25:53,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:25:53,552 INFO L225 Difference]: With dead ends: 36 [2024-11-18 14:25:53,552 INFO L226 Difference]: Without dead ends: 0 [2024-11-18 14:25:53,552 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2024-11-18 14:25:53,553 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:25:53,553 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 130 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:25:53,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-18 14:25:53,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-18 14:25:53,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 14:25:53,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-18 14:25:53,554 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 52 [2024-11-18 14:25:53,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:25:53,554 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-18 14:25:53,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 8 states have return successors, (8), 8 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-18 14:25:53,555 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-18 14:25:53,555 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-18 14:25:53,557 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-18 14:25:53,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-18 14:25:53,561 INFO L407 BasicCegarLoop]: Path program histogram: [3, 3, 1, 1] [2024-11-18 14:25:53,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-18 14:25:54,093 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-18 14:25:54,146 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 02:25:54 BoogieIcfgContainer [2024-11-18 14:25:54,146 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-18 14:25:54,147 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-18 14:25:54,147 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-18 14:25:54,148 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-18 14:25:54,148 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:25:46" (3/4) ... [2024-11-18 14:25:54,151 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-18 14:25:54,155 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure id2 [2024-11-18 14:25:54,155 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2024-11-18 14:25:54,160 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2024-11-18 14:25:54,160 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-11-18 14:25:54,160 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-18 14:25:54,160 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-18 14:25:54,249 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-11-18 14:25:54,249 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-11-18 14:25:54,249 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-18 14:25:54,250 INFO L158 Benchmark]: Toolchain (without parser) took 7961.69ms. Allocated memory was 159.4MB in the beginning and 251.7MB in the end (delta: 92.3MB). Free memory was 102.1MB in the beginning and 182.4MB in the end (delta: -80.3MB). Peak memory consumption was 12.8MB. Max. memory is 16.1GB. [2024-11-18 14:25:54,250 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 159.4MB. Free memory is still 118.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-18 14:25:54,250 INFO L158 Benchmark]: CACSL2BoogieTranslator took 262.96ms. Allocated memory is still 159.4MB. Free memory was 102.1MB in the beginning and 89.9MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-18 14:25:54,250 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.38ms. Allocated memory is still 159.4MB. Free memory was 89.9MB in the beginning and 88.3MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-18 14:25:54,251 INFO L158 Benchmark]: Boogie Preprocessor took 40.42ms. Allocated memory is still 159.4MB. Free memory was 88.3MB in the beginning and 86.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-18 14:25:54,251 INFO L158 Benchmark]: RCFGBuilder took 288.68ms. Allocated memory is still 159.4MB. Free memory was 86.6MB in the beginning and 76.8MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-11-18 14:25:54,251 INFO L158 Benchmark]: TraceAbstraction took 7232.10ms. Allocated memory was 159.4MB in the beginning and 251.7MB in the end (delta: 92.3MB). Free memory was 76.1MB in the beginning and 186.6MB in the end (delta: -110.5MB). Peak memory consumption was 71.5MB. Max. memory is 16.1GB. [2024-11-18 14:25:54,251 INFO L158 Benchmark]: Witness Printer took 102.06ms. Allocated memory is still 251.7MB. Free memory was 186.6MB in the beginning and 182.4MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-18 14:25:54,253 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 159.4MB. Free memory is still 118.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 262.96ms. Allocated memory is still 159.4MB. Free memory was 102.1MB in the beginning and 89.9MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.38ms. Allocated memory is still 159.4MB. Free memory was 89.9MB in the beginning and 88.3MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 40.42ms. Allocated memory is still 159.4MB. Free memory was 88.3MB in the beginning and 86.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 288.68ms. Allocated memory is still 159.4MB. Free memory was 86.6MB in the beginning and 76.8MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 7232.10ms. Allocated memory was 159.4MB in the beginning and 251.7MB in the end (delta: 92.3MB). Free memory was 76.1MB in the beginning and 186.6MB in the end (delta: -110.5MB). Peak memory consumption was 71.5MB. Max. memory is 16.1GB. * Witness Printer took 102.06ms. Allocated memory is still 251.7MB. Free memory was 186.6MB in the beginning and 182.4MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 23]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.6s, OverallIterations: 8, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 123 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 92 mSDsluCounter, 1171 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1006 mSDsCounter, 22 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 591 IncrementalHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 22 mSolverCounterUnsat, 165 mSDtfsCounter, 591 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 405 GetRequests, 285 SyntacticMatches, 13 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=6, InterpolantAutomatonStates: 83, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 40 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 418 NumberOfCodeBlocks, 418 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 525 ConstructedInterpolants, 0 QuantifiedInterpolants, 1313 SizeOfPredicates, 15 NumberOfNonLiveVariables, 490 ConjunctsInSsa, 73 ConjunctsInUnsatCore, 17 InterpolantComputations, 4 PerfectInterpolantSequences, 240/360 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 14]: Procedure Contract for id2 Derived contract for procedure id2. Ensures: ((((((x == 1) || ((x <= 2) && (\result == 2))) && (1 <= x)) || (4 < x)) || (((3 == x) || (\result == 4)) && (3 <= x))) || (((0 <= x) && (\result == 0)) && (x <= 1))) - ProcedureContractResult [Line: 9]: Procedure Contract for id Derived contract for procedure id. Ensures: ((((((x == 0) || (x == 4)) || ((5 == \result) && (5 == x))) || ((((3 == \result) && (x <= 4)) || (x == 2)) && (2 <= x))) || (((\result == 1) && (x <= 2)) && (1 <= x))) || (5 < x)) RESULT: Ultimate proved your program to be correct! [2024-11-18 14:25:54,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE