./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/deep-nested.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/deep-nested.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f4fa4f6a03e1cc5362361e8e2a443a39504511936859bef102e6d3337f038be8 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 01:58:43,584 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 01:58:43,658 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 01:58:43,663 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 01:58:43,663 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 01:58:43,689 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 01:58:43,690 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 01:58:43,691 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 01:58:43,691 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 01:58:43,691 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 01:58:43,692 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 01:58:43,692 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 01:58:43,693 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 01:58:43,693 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 01:58:43,694 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 01:58:43,694 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 01:58:43,696 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 01:58:43,696 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 01:58:43,697 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 01:58:43,697 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 01:58:43,697 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 01:58:43,701 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 01:58:43,702 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 01:58:43,702 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 01:58:43,702 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 01:58:43,702 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 01:58:43,702 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 01:58:43,703 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 01:58:43,703 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 01:58:43,703 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 01:58:43,703 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 01:58:43,704 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 01:58:43,704 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 01:58:43,704 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 01:58:43,704 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 01:58:43,705 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 01:58:43,705 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 01:58:43,707 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 01:58:43,707 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 01:58:43,708 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 01:58:43,708 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 01:58:43,708 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 01:58:43,708 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4fa4f6a03e1cc5362361e8e2a443a39504511936859bef102e6d3337f038be8 [2024-10-11 01:58:43,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 01:58:43,968 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 01:58:43,971 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 01:58:43,972 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 01:58:43,972 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 01:58:43,973 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/deep-nested.c [2024-10-11 01:58:45,434 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 01:58:45,630 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 01:58:45,631 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/deep-nested.c [2024-10-11 01:58:45,642 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/c505c91f0/ed81e0ee2a96457190e1761014732411/FLAG15705dfc5 [2024-10-11 01:58:45,658 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/c505c91f0/ed81e0ee2a96457190e1761014732411 [2024-10-11 01:58:45,660 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 01:58:45,662 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 01:58:45,663 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 01:58:45,663 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 01:58:45,668 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 01:58:45,669 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 01:58:45" (1/1) ... [2024-10-11 01:58:45,670 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5134efe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:58:45, skipping insertion in model container [2024-10-11 01:58:45,670 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 01:58:45" (1/1) ... [2024-10-11 01:58:45,692 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 01:58:45,899 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/deep-nested.c[863,876] [2024-10-11 01:58:45,906 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 01:58:45,913 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 01:58:45,928 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/deep-nested.c[863,876] [2024-10-11 01:58:45,929 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 01:58:45,941 INFO L204 MainTranslator]: Completed translation [2024-10-11 01:58:45,941 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:58:45 WrapperNode [2024-10-11 01:58:45,941 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 01:58:45,942 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 01:58:45,942 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 01:58:45,942 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 01:58:45,949 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:58:45" (1/1) ... [2024-10-11 01:58:45,953 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:58:45" (1/1) ... [2024-10-11 01:58:45,967 INFO L138 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2024-10-11 01:58:45,968 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 01:58:45,970 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 01:58:45,970 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 01:58:45,970 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 01:58:45,979 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:58:45" (1/1) ... [2024-10-11 01:58:45,979 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:58:45" (1/1) ... [2024-10-11 01:58:45,984 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:58:45" (1/1) ... [2024-10-11 01:58:45,998 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]. [2024-10-11 01:58:45,998 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:58:45" (1/1) ... [2024-10-11 01:58:45,998 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:58:45" (1/1) ... [2024-10-11 01:58:46,000 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:58:45" (1/1) ... [2024-10-11 01:58:46,004 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:58:45" (1/1) ... [2024-10-11 01:58:46,004 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:58:45" (1/1) ... [2024-10-11 01:58:46,005 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:58:45" (1/1) ... [2024-10-11 01:58:46,006 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 01:58:46,011 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 01:58:46,011 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 01:58:46,011 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 01:58:46,012 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:58:45" (1/1) ... [2024-10-11 01:58:46,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 01:58:46,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:58:46,041 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 01:58:46,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 01:58:46,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 01:58:46,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 01:58:46,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 01:58:46,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 01:58:46,133 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 01:58:46,135 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 01:58:46,273 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-10-11 01:58:46,274 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 01:58:46,297 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 01:58:46,297 INFO L314 CfgBuilder]: Removed 5 assume(true) statements. [2024-10-11 01:58:46,297 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 01:58:46 BoogieIcfgContainer [2024-10-11 01:58:46,297 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 01:58:46,301 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 01:58:46,301 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 01:58:46,304 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 01:58:46,305 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 01:58:45" (1/3) ... [2024-10-11 01:58:46,305 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49f9c7cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 01:58:46, skipping insertion in model container [2024-10-11 01:58:46,306 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:58:45" (2/3) ... [2024-10-11 01:58:46,307 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49f9c7cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 01:58:46, skipping insertion in model container [2024-10-11 01:58:46,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 01:58:46" (3/3) ... [2024-10-11 01:58:46,308 INFO L112 eAbstractionObserver]: Analyzing ICFG deep-nested.c [2024-10-11 01:58:46,324 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 01:58:46,324 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 01:58:46,375 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 01:58:46,380 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;@7f164f99, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 01:58:46,381 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-11 01:58:46,384 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:46,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-11 01:58:46,388 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:58:46,389 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 01:58:46,389 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:58:46,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:58:46,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1672362000, now seen corresponding path program 1 times [2024-10-11 01:58:46,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:58:46,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526441205] [2024-10-11 01:58:46,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:58:46,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:58:46,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:58:46,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 01:58:46,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:58:46,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526441205] [2024-10-11 01:58:46,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526441205] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 01:58:46,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 01:58:46,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 01:58:46,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636407365] [2024-10-11 01:58:46,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 01:58:46,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 01:58:46,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:58:46,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 01:58:46,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 01:58:46,796 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:46,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:58:46,888 INFO L93 Difference]: Finished difference Result 34 states and 57 transitions. [2024-10-11 01:58:46,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 01:58:46,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-11 01:58:46,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:58:46,897 INFO L225 Difference]: With dead ends: 34 [2024-10-11 01:58:46,897 INFO L226 Difference]: Without dead ends: 17 [2024-10-11 01:58:46,899 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-11 01:58:46,902 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 01:58:46,903 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 10 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 01:58:46,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-10-11 01:58:46,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2024-10-11 01:58:46,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:46,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2024-10-11 01:58:46,929 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 8 [2024-10-11 01:58:46,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:58:46,930 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2024-10-11 01:58:46,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:46,931 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2024-10-11 01:58:46,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-11 01:58:46,932 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:58:46,933 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 01:58:46,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 01:58:46,933 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:58:46,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:58:46,935 INFO L85 PathProgramCache]: Analyzing trace with hash 288176442, now seen corresponding path program 1 times [2024-10-11 01:58:46,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:58:46,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226946346] [2024-10-11 01:58:46,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:58:46,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:58:46,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:58:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 01:58:47,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:58:47,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226946346] [2024-10-11 01:58:47,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226946346] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 01:58:47,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 01:58:47,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 01:58:47,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319047868] [2024-10-11 01:58:47,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 01:58:47,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 01:58:47,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:58:47,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 01:58:47,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 01:58:47,458 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:47,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:58:47,513 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2024-10-11 01:58:47,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 01:58:47,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-11 01:58:47,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:58:47,515 INFO L225 Difference]: With dead ends: 31 [2024-10-11 01:58:47,515 INFO L226 Difference]: Without dead ends: 29 [2024-10-11 01:58:47,515 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 01:58:47,517 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 11 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 [2024-10-11 01:58:47,518 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 11 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 01:58:47,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-11 01:58:47,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-10-11 01:58:47,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:47,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2024-10-11 01:58:47,531 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 11 [2024-10-11 01:58:47,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:58:47,531 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2024-10-11 01:58:47,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:47,532 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2024-10-11 01:58:47,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-11 01:58:47,533 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:58:47,533 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 01:58:47,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 01:58:47,534 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:58:47,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:58:47,536 INFO L85 PathProgramCache]: Analyzing trace with hash 22882177, now seen corresponding path program 1 times [2024-10-11 01:58:47,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:58:47,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182707253] [2024-10-11 01:58:47,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:58:47,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:58:47,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:58:47,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 01:58:47,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:58:47,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182707253] [2024-10-11 01:58:47,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182707253] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:58:47,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347552092] [2024-10-11 01:58:47,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:58:47,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:58:47,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:58:47,805 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:58:47,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 01:58:47,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:58:47,866 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 01:58:47,871 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:58:47,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 01:58:47,927 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 01:58:47,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347552092] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 01:58:47,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 01:58:47,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2024-10-11 01:58:47,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064372041] [2024-10-11 01:58:47,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 01:58:47,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 01:58:47,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:58:47,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 01:58:47,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-11 01:58:47,931 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:48,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:58:48,021 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2024-10-11 01:58:48,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 01:58:48,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-10-11 01:58:48,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:58:48,023 INFO L225 Difference]: With dead ends: 66 [2024-10-11 01:58:48,023 INFO L226 Difference]: Without dead ends: 51 [2024-10-11 01:58:48,023 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-10-11 01:58:48,025 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 50 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 01:58:48,026 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 14 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 01:58:48,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-11 01:58:48,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 29. [2024-10-11 01:58:48,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:48,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2024-10-11 01:58:48,039 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 14 [2024-10-11 01:58:48,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:58:48,039 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2024-10-11 01:58:48,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:48,040 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2024-10-11 01:58:48,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-11 01:58:48,040 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:58:48,040 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 01:58:48,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 01:58:48,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:58:48,241 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:58:48,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:58:48,242 INFO L85 PathProgramCache]: Analyzing trace with hash -4911268, now seen corresponding path program 1 times [2024-10-11 01:58:48,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:58:48,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322911496] [2024-10-11 01:58:48,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:58:48,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:58:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:58:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 01:58:48,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:58:48,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322911496] [2024-10-11 01:58:48,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322911496] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:58:48,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738975335] [2024-10-11 01:58:48,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:58:48,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:58:48,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:58:48,472 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:58:48,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 01:58:48,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:58:48,519 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 01:58:48,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:58:48,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 01:58:48,574 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 01:58:48,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738975335] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 01:58:48,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 01:58:48,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2024-10-11 01:58:48,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479058854] [2024-10-11 01:58:48,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 01:58:48,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 01:58:48,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:58:48,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 01:58:48,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-10-11 01:58:48,577 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:48,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:58:48,676 INFO L93 Difference]: Finished difference Result 75 states and 97 transitions. [2024-10-11 01:58:48,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 01:58:48,677 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-10-11 01:58:48,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:58:48,678 INFO L225 Difference]: With dead ends: 75 [2024-10-11 01:58:48,678 INFO L226 Difference]: Without dead ends: 49 [2024-10-11 01:58:48,680 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-10-11 01:58:48,680 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 90 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 01:58:48,681 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 12 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 01:58:48,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-11 01:58:48,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 31. [2024-10-11 01:58:48,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:48,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2024-10-11 01:58:48,696 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 17 [2024-10-11 01:58:48,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:58:48,697 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2024-10-11 01:58:48,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:48,697 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2024-10-11 01:58:48,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-11 01:58:48,698 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:58:48,698 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 01:58:48,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 01:58:48,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:58:48,903 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:58:48,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:58:48,903 INFO L85 PathProgramCache]: Analyzing trace with hash -332318709, now seen corresponding path program 1 times [2024-10-11 01:58:48,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:58:48,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519783753] [2024-10-11 01:58:48,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:58:48,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:58:48,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:58:49,099 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 01:58:49,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:58:49,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519783753] [2024-10-11 01:58:49,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519783753] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:58:49,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033474678] [2024-10-11 01:58:49,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:58:49,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:58:49,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:58:49,104 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:58:49,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 01:58:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:58:49,150 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 01:58:49,151 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:58:49,195 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 01:58:49,195 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 01:58:49,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033474678] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 01:58:49,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 01:58:49,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2024-10-11 01:58:49,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111394182] [2024-10-11 01:58:49,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 01:58:49,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 01:58:49,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:58:49,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 01:58:49,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-10-11 01:58:49,198 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:49,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:58:49,281 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2024-10-11 01:58:49,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 01:58:49,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-10-11 01:58:49,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:58:49,282 INFO L225 Difference]: With dead ends: 75 [2024-10-11 01:58:49,283 INFO L226 Difference]: Without dead ends: 47 [2024-10-11 01:58:49,283 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-10-11 01:58:49,284 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 61 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 01:58:49,284 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 12 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 01:58:49,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-11 01:58:49,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 33. [2024-10-11 01:58:49,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:49,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2024-10-11 01:58:49,294 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 20 [2024-10-11 01:58:49,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:58:49,295 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2024-10-11 01:58:49,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:49,295 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2024-10-11 01:58:49,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-11 01:58:49,296 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:58:49,296 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 01:58:49,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 01:58:49,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:58:49,501 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:58:49,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:58:49,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1991159868, now seen corresponding path program 1 times [2024-10-11 01:58:49,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:58:49,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925682984] [2024-10-11 01:58:49,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:58:49,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:58:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:58:49,771 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 01:58:49,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:58:49,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925682984] [2024-10-11 01:58:49,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925682984] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:58:49,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959452998] [2024-10-11 01:58:49,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:58:49,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:58:49,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:58:49,776 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:58:49,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 01:58:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:58:49,826 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 01:58:49,828 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:58:49,961 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 01:58:49,962 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:58:50,220 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 01:58:50,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959452998] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:58:50,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:58:50,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-10-11 01:58:50,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317899691] [2024-10-11 01:58:50,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:58:50,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 01:58:50,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:58:50,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 01:58:50,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-10-11 01:58:50,222 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:51,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:58:51,366 INFO L93 Difference]: Finished difference Result 180 states and 237 transitions. [2024-10-11 01:58:51,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-11 01:58:51,368 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-10-11 01:58:51,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:58:51,369 INFO L225 Difference]: With dead ends: 180 [2024-10-11 01:58:51,370 INFO L226 Difference]: Without dead ends: 110 [2024-10-11 01:58:51,372 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=401, Invalid=1579, Unknown=0, NotChecked=0, Total=1980 [2024-10-11 01:58:51,373 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 402 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 01:58:51,374 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 49 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 01:58:51,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-10-11 01:58:51,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 70. [2024-10-11 01:58:51,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 69 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:51,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2024-10-11 01:58:51,401 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 26 [2024-10-11 01:58:51,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:58:51,401 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2024-10-11 01:58:51,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:51,401 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2024-10-11 01:58:51,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-11 01:58:51,402 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:58:51,403 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-10-11 01:58:51,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-11 01:58:51,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-11 01:58:51,604 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:58:51,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:58:51,604 INFO L85 PathProgramCache]: Analyzing trace with hash -173694039, now seen corresponding path program 2 times [2024-10-11 01:58:51,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:58:51,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941781505] [2024-10-11 01:58:51,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:58:51,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:58:51,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:58:51,946 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 01:58:51,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:58:51,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941781505] [2024-10-11 01:58:51,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941781505] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:58:51,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146381274] [2024-10-11 01:58:51,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 01:58:51,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:58:51,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:58:51,949 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:58:51,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 01:58:51,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-11 01:58:51,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 01:58:51,998 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-11 01:58:52,001 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:58:52,109 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-10-11 01:58:52,109 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 01:58:52,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146381274] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 01:58:52,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 01:58:52,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2024-10-11 01:58:52,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526727731] [2024-10-11 01:58:52,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 01:58:52,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 01:58:52,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:58:52,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 01:58:52,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-10-11 01:58:52,111 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:52,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:58:52,159 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2024-10-11 01:58:52,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 01:58:52,159 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2024-10-11 01:58:52,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:58:52,160 INFO L225 Difference]: With dead ends: 72 [2024-10-11 01:58:52,161 INFO L226 Difference]: Without dead ends: 70 [2024-10-11 01:58:52,161 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-10-11 01:58:52,162 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 01:58:52,163 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 10 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 01:58:52,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-10-11 01:58:52,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2024-10-11 01:58:52,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 68 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:52,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2024-10-11 01:58:52,185 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 47 [2024-10-11 01:58:52,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:58:52,186 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2024-10-11 01:58:52,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:52,186 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2024-10-11 01:58:52,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-10-11 01:58:52,187 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:58:52,187 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2024-10-11 01:58:52,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-11 01:58:52,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:58:52,388 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:58:52,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:58:52,389 INFO L85 PathProgramCache]: Analyzing trace with hash 915111332, now seen corresponding path program 3 times [2024-10-11 01:58:52,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:58:52,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192468513] [2024-10-11 01:58:52,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:58:52,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:58:52,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:58:52,748 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 17 proven. 64 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2024-10-11 01:58:52,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:58:52,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192468513] [2024-10-11 01:58:52,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192468513] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:58:52,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040455108] [2024-10-11 01:58:52,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 01:58:52,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:58:52,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:58:52,751 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:58:52,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 01:58:52,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-10-11 01:58:52,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 01:58:52,801 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 01:58:52,803 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:58:52,917 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2024-10-11 01:58:52,918 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 01:58:52,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040455108] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 01:58:52,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 01:58:52,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2024-10-11 01:58:52,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850076332] [2024-10-11 01:58:52,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 01:58:52,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 01:58:52,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:58:52,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 01:58:52,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-10-11 01:58:52,922 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:52,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:58:52,972 INFO L93 Difference]: Finished difference Result 104 states and 122 transitions. [2024-10-11 01:58:52,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 01:58:52,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2024-10-11 01:58:52,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:58:52,974 INFO L225 Difference]: With dead ends: 104 [2024-10-11 01:58:52,974 INFO L226 Difference]: Without dead ends: 102 [2024-10-11 01:58:52,974 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-10-11 01:58:52,975 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 01:58:52,975 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 10 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 01:58:52,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-10-11 01:58:52,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2024-10-11 01:58:52,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 75 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:53,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2024-10-11 01:58:53,001 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 62 [2024-10-11 01:58:53,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:58:53,001 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2024-10-11 01:58:53,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:53,002 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2024-10-11 01:58:53,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-10-11 01:58:53,003 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:58:53,003 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2024-10-11 01:58:53,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-11 01:58:53,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-11 01:58:53,204 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:58:53,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:58:53,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1461750529, now seen corresponding path program 4 times [2024-10-11 01:58:53,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:58:53,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142592470] [2024-10-11 01:58:53,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:58:53,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:58:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:58:53,569 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 18 proven. 83 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-10-11 01:58:53,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:58:53,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142592470] [2024-10-11 01:58:53,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142592470] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:58:53,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176890580] [2024-10-11 01:58:53,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 01:58:53,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:58:53,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:58:53,572 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:58:53,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 01:58:53,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 01:58:53,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 01:58:53,631 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-11 01:58:53,634 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:58:53,858 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 86 proven. 71 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-10-11 01:58:53,858 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:58:54,145 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 28 proven. 129 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-10-11 01:58:54,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176890580] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:58:54,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:58:54,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2024-10-11 01:58:54,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208394231] [2024-10-11 01:58:54,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:58:54,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 01:58:54,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:58:54,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 01:58:54,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2024-10-11 01:58:54,150 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 21 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:54,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:58:54,444 INFO L93 Difference]: Finished difference Result 213 states and 265 transitions. [2024-10-11 01:58:54,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 01:58:54,444 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 21 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2024-10-11 01:58:54,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:58:54,445 INFO L225 Difference]: With dead ends: 213 [2024-10-11 01:58:54,445 INFO L226 Difference]: Without dead ends: 115 [2024-10-11 01:58:54,448 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2024-10-11 01:58:54,450 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 33 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 01:58:54,450 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 69 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 01:58:54,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-10-11 01:58:54,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 106. [2024-10-11 01:58:54,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 105 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:54,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 121 transitions. [2024-10-11 01:58:54,475 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 121 transitions. Word has length 71 [2024-10-11 01:58:54,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:58:54,475 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 121 transitions. [2024-10-11 01:58:54,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 21 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:54,479 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 121 transitions. [2024-10-11 01:58:54,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-10-11 01:58:54,481 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:58:54,481 INFO L215 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2024-10-11 01:58:54,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-11 01:58:54,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:58:54,683 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:58:54,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:58:54,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1787036673, now seen corresponding path program 5 times [2024-10-11 01:58:54,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:58:54,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077128118] [2024-10-11 01:58:54,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:58:54,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:58:54,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:58:55,221 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 18 proven. 270 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2024-10-11 01:58:55,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:58:55,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077128118] [2024-10-11 01:58:55,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077128118] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:58:55,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869528100] [2024-10-11 01:58:55,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 01:58:55,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:58:55,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:58:55,223 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:58:55,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 01:58:55,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-10-11 01:58:55,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 01:58:55,680 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 01:58:55,682 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:58:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 426 proven. 84 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2024-10-11 01:58:55,853 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:58:56,063 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 408 proven. 102 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2024-10-11 01:58:56,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869528100] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:58:56,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:58:56,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-10-11 01:58:56,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619653104] [2024-10-11 01:58:56,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:58:56,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-11 01:58:56,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:58:56,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-11 01:58:56,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-10-11 01:58:56,065 INFO L87 Difference]: Start difference. First operand 106 states and 121 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:56,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:58:56,782 INFO L93 Difference]: Finished difference Result 408 states and 478 transitions. [2024-10-11 01:58:56,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-11 01:58:56,782 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2024-10-11 01:58:56,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:58:56,783 INFO L225 Difference]: With dead ends: 408 [2024-10-11 01:58:56,783 INFO L226 Difference]: Without dead ends: 268 [2024-10-11 01:58:56,784 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=246, Invalid=1236, Unknown=0, NotChecked=0, Total=1482 [2024-10-11 01:58:56,786 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 94 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 01:58:56,786 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 54 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 01:58:56,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2024-10-11 01:58:56,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 193. [2024-10-11 01:58:56,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.1041666666666667) internal successors, (212), 192 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:56,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 212 transitions. [2024-10-11 01:58:56,841 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 212 transitions. Word has length 101 [2024-10-11 01:58:56,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:58:56,841 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 212 transitions. [2024-10-11 01:58:56,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:56,841 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 212 transitions. [2024-10-11 01:58:56,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2024-10-11 01:58:56,844 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:58:56,844 INFO L215 NwaCegarLoop]: trace histogram [46, 45, 45, 9, 8, 8, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2024-10-11 01:58:56,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-11 01:58:57,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 01:58:57,045 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:58:57,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:58:57,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1270388469, now seen corresponding path program 6 times [2024-10-11 01:58:57,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:58:57,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609084487] [2024-10-11 01:58:57,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:58:57,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:58:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:58:57,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3588 backedges. 22 proven. 768 refuted. 0 times theorem prover too weak. 2798 trivial. 0 not checked. [2024-10-11 01:58:57,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:58:57,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609084487] [2024-10-11 01:58:57,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609084487] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:58:57,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830709672] [2024-10-11 01:58:57,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 01:58:57,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:58:57,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:58:57,932 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:58:57,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 01:58:57,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-10-11 01:58:57,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 01:58:57,997 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 01:58:58,005 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:58:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3588 backedges. 1623 proven. 0 refuted. 0 times theorem prover too weak. 1965 trivial. 0 not checked. [2024-10-11 01:58:58,333 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 01:58:58,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830709672] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 01:58:58,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 01:58:58,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2024-10-11 01:58:58,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869695461] [2024-10-11 01:58:58,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 01:58:58,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 01:58:58,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:58:58,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 01:58:58,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-10-11 01:58:58,335 INFO L87 Difference]: Start difference. First operand 193 states and 212 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:58,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:58:58,424 INFO L93 Difference]: Finished difference Result 364 states and 396 transitions. [2024-10-11 01:58:58,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 01:58:58,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2024-10-11 01:58:58,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:58:58,426 INFO L225 Difference]: With dead ends: 364 [2024-10-11 01:58:58,426 INFO L226 Difference]: Without dead ends: 362 [2024-10-11 01:58:58,427 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-10-11 01:58:58,427 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 01:58:58,427 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 10 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 01:58:58,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2024-10-11 01:58:58,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 230. [2024-10-11 01:58:58,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.1004366812227073) internal successors, (252), 229 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:58,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 252 transitions. [2024-10-11 01:58:58,476 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 252 transitions. Word has length 188 [2024-10-11 01:58:58,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:58:58,477 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 252 transitions. [2024-10-11 01:58:58,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:58:58,477 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 252 transitions. [2024-10-11 01:58:58,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2024-10-11 01:58:58,480 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:58:58,480 INFO L215 NwaCegarLoop]: trace histogram [56, 55, 55, 11, 10, 10, 5, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1] [2024-10-11 01:58:58,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-11 01:58:58,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:58:58,681 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:58:58,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:58:58,681 INFO L85 PathProgramCache]: Analyzing trace with hash -576649274, now seen corresponding path program 7 times [2024-10-11 01:58:58,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:58:58,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674158413] [2024-10-11 01:58:58,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:58:58,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:58:58,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:58:59,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5368 backedges. 26 proven. 950 refuted. 0 times theorem prover too weak. 4392 trivial. 0 not checked. [2024-10-11 01:58:59,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:58:59,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674158413] [2024-10-11 01:58:59,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674158413] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:58:59,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717613372] [2024-10-11 01:58:59,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 01:58:59,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:58:59,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:58:59,674 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:58:59,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 01:58:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:58:59,790 INFO L255 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-11 01:58:59,794 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:59:00,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5368 backedges. 1622 proven. 116 refuted. 0 times theorem prover too weak. 3630 trivial. 0 not checked. [2024-10-11 01:59:00,032 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:59:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5368 backedges. 1622 proven. 116 refuted. 0 times theorem prover too weak. 3630 trivial. 0 not checked. [2024-10-11 01:59:00,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717613372] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:59:00,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:59:00,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 25 [2024-10-11 01:59:00,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666274273] [2024-10-11 01:59:00,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:59:00,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-11 01:59:00,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:59:00,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-11 01:59:00,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2024-10-11 01:59:00,355 INFO L87 Difference]: Start difference. First operand 230 states and 252 transitions. Second operand has 25 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:59:15,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:59:15,715 INFO L93 Difference]: Finished difference Result 1099 states and 1284 transitions. [2024-10-11 01:59:15,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-10-11 01:59:15,715 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 227 [2024-10-11 01:59:15,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:59:15,720 INFO L225 Difference]: With dead ends: 1099 [2024-10-11 01:59:15,721 INFO L226 Difference]: Without dead ends: 873 [2024-10-11 01:59:15,724 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2062 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=1136, Invalid=5670, Unknown=0, NotChecked=0, Total=6806 [2024-10-11 01:59:15,724 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 379 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-11 01:59:15,725 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 64 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-11 01:59:15,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2024-10-11 01:59:15,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 799. [2024-10-11 01:59:15,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 1.0526315789473684) internal successors, (840), 798 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:59:15,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 840 transitions. [2024-10-11 01:59:15,848 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 840 transitions. Word has length 227 [2024-10-11 01:59:15,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:59:15,848 INFO L471 AbstractCegarLoop]: Abstraction has 799 states and 840 transitions. [2024-10-11 01:59:15,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:59:15,848 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 840 transitions. [2024-10-11 01:59:15,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 795 [2024-10-11 01:59:15,862 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:59:15,862 INFO L215 NwaCegarLoop]: trace histogram [226, 225, 225, 30, 29, 29, 5, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1] [2024-10-11 01:59:15,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-11 01:59:16,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-11 01:59:16,063 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:59:16,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:59:16,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1105811065, now seen corresponding path program 8 times [2024-10-11 01:59:16,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:59:16,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404931645] [2024-10-11 01:59:16,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:59:16,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:59:17,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:59:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 84025 backedges. 45 proven. 6003 refuted. 0 times theorem prover too weak. 77977 trivial. 0 not checked. [2024-10-11 01:59:20,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:59:20,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404931645] [2024-10-11 01:59:20,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404931645] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:59:20,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180359923] [2024-10-11 01:59:20,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 01:59:20,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:59:20,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:59:20,443 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:59:20,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 01:59:20,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 01:59:20,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 01:59:20,729 INFO L255 TraceCheckSpWp]: Trace formula consists of 1171 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-11 01:59:20,740 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:59:21,210 INFO L134 CoverageAnalysis]: Checked inductivity of 84025 backedges. 20384 proven. 670 refuted. 0 times theorem prover too weak. 62971 trivial. 0 not checked. [2024-10-11 01:59:21,210 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:59:21,962 INFO L134 CoverageAnalysis]: Checked inductivity of 84025 backedges. 19972 proven. 1082 refuted. 0 times theorem prover too weak. 62971 trivial. 0 not checked. [2024-10-11 01:59:21,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180359923] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:59:21,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:59:21,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 19] total 47 [2024-10-11 01:59:21,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760450772] [2024-10-11 01:59:21,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:59:21,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-10-11 01:59:21,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:59:21,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-10-11 01:59:21,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1892, Unknown=0, NotChecked=0, Total=2162 [2024-10-11 01:59:21,967 INFO L87 Difference]: Start difference. First operand 799 states and 840 transitions. Second operand has 47 states, 47 states have (on average 3.5319148936170213) internal successors, (166), 47 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:59:43,672 WARN L286 SmtUtils]: Spent 20.68s on a formula simplification. DAG size of input: 52 DAG size of output: 37 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-10-11 02:00:00,573 WARN L286 SmtUtils]: Spent 16.15s on a formula simplification. DAG size of input: 51 DAG size of output: 38 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-10-11 02:00:18,531 WARN L286 SmtUtils]: Spent 17.21s on a formula simplification. DAG size of input: 46 DAG size of output: 34 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)