./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_20x0-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_20x0-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2467b918f90fe26ead39772ec36304202be3f16a6c04dfdd5844d39d05599b5a --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-19 22:12:51,890 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 22:12:51,942 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-19 22:12:51,946 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 22:12:51,946 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 22:12:51,969 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 22:12:51,970 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 22:12:51,970 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 22:12:51,971 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 22:12:51,971 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 22:12:51,972 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 22:12:51,972 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 22:12:51,972 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 22:12:51,974 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 22:12:51,974 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 22:12:51,974 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 22:12:51,975 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 22:12:51,975 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 22:12:51,975 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 22:12:51,975 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 22:12:51,975 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 22:12:51,978 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 22:12:51,978 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 22:12:51,978 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 22:12:51,979 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 22:12:51,979 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 22:12:51,979 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 22:12:51,979 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 22:12:51,979 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 22:12:51,980 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 22:12:51,980 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 22:12:51,980 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 22:12:51,980 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 22:12:51,980 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 22:12:51,980 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 22:12:51,980 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 22:12:51,981 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 22:12:51,981 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 22:12:51,981 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 22:12:51,981 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 22:12:51,982 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 22:12:51,982 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 22:12:51,982 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2467b918f90fe26ead39772ec36304202be3f16a6c04dfdd5844d39d05599b5a [2024-11-19 22:12:52,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 22:12:52,195 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 22:12:52,196 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 22:12:52,197 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 22:12:52,198 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 22:12:52,198 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_20x0-2.c [2024-11-19 22:12:53,416 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 22:12:53,541 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 22:12:53,542 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_20x0-2.c [2024-11-19 22:12:53,546 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2da0c3e3a/422b0c6922944f8093932a479c2a688f/FLAGc9081eb95 [2024-11-19 22:12:53,567 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2da0c3e3a/422b0c6922944f8093932a479c2a688f [2024-11-19 22:12:53,569 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 22:12:53,570 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 22:12:53,571 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 22:12:53,571 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 22:12:53,575 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 22:12:53,576 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:12:53" (1/1) ... [2024-11-19 22:12:53,576 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@356d2b30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:12:53, skipping insertion in model container [2024-11-19 22:12:53,576 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:12:53" (1/1) ... [2024-11-19 22:12:53,591 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 22:12:53,730 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_20x0-2.c[481,494] [2024-11-19 22:12:53,733 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 22:12:53,742 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 22:12:53,753 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_20x0-2.c[481,494] [2024-11-19 22:12:53,753 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 22:12:53,766 INFO L204 MainTranslator]: Completed translation [2024-11-19 22:12:53,766 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:12:53 WrapperNode [2024-11-19 22:12:53,766 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 22:12:53,767 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 22:12:53,767 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 22:12:53,768 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 22:12:53,773 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:12:53" (1/1) ... [2024-11-19 22:12:53,777 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:12:53" (1/1) ... [2024-11-19 22:12:53,788 INFO L138 Inliner]: procedures = 12, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2024-11-19 22:12:53,789 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 22:12:53,789 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 22:12:53,790 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 22:12:53,790 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 22:12:53,797 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:12:53" (1/1) ... [2024-11-19 22:12:53,798 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:12:53" (1/1) ... [2024-11-19 22:12:53,799 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:12:53" (1/1) ... [2024-11-19 22:12:53,806 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-19 22:12:53,807 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:12:53" (1/1) ... [2024-11-19 22:12:53,807 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:12:53" (1/1) ... [2024-11-19 22:12:53,808 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:12:53" (1/1) ... [2024-11-19 22:12:53,809 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:12:53" (1/1) ... [2024-11-19 22:12:53,809 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:12:53" (1/1) ... [2024-11-19 22:12:53,810 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:12:53" (1/1) ... [2024-11-19 22:12:53,810 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 22:12:53,811 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 22:12:53,811 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 22:12:53,811 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 22:12:53,812 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:12:53" (1/1) ... [2024-11-19 22:12:53,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 22:12:53,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:12:53,839 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-19 22:12:53,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-19 22:12:53,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 22:12:53,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 22:12:53,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 22:12:53,877 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2024-11-19 22:12:53,877 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2024-11-19 22:12:53,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 22:12:53,918 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 22:12:53,919 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 22:12:53,977 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-11-19 22:12:53,977 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 22:12:53,984 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 22:12:53,985 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-19 22:12:53,985 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:12:53 BoogieIcfgContainer [2024-11-19 22:12:53,985 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 22:12:53,987 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 22:12:53,987 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 22:12:53,989 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 22:12:53,989 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 10:12:53" (1/3) ... [2024-11-19 22:12:53,990 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31be9de6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 10:12:53, skipping insertion in model container [2024-11-19 22:12:53,990 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:12:53" (2/3) ... [2024-11-19 22:12:53,990 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31be9de6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 10:12:53, skipping insertion in model container [2024-11-19 22:12:53,990 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:12:53" (3/3) ... [2024-11-19 22:12:53,991 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_20x0-2.c [2024-11-19 22:12:54,004 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 22:12:54,004 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-19 22:12:54,049 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 22:12:54,054 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;@621727bd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 22:12:54,055 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-19 22:12:54,058 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 22:12:54,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-19 22:12:54,064 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:12:54,065 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:12:54,065 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:12:54,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:12:54,070 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2024-11-19 22:12:54,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:12:54,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321208970] [2024-11-19 22:12:54,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:12:54,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:12:54,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:54,230 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:54,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:54,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 22:12:54,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:12:54,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321208970] [2024-11-19 22:12:54,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321208970] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 22:12:54,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 22:12:54,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 22:12:54,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034792060] [2024-11-19 22:12:54,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 22:12:54,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 22:12:54,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:12:54,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 22:12:54,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 22:12:54,314 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-19 22:12:54,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:12:54,355 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2024-11-19 22:12:54,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 22:12:54,357 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-11-19 22:12:54,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:12:54,363 INFO L225 Difference]: With dead ends: 25 [2024-11-19 22:12:54,363 INFO L226 Difference]: Without dead ends: 15 [2024-11-19 22:12:54,365 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 22:12:54,368 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 4 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 22:12:54,370 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 35 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 22:12:54,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-19 22:12:54,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-11-19 22:12:54,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 22:12:54,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2024-11-19 22:12:54,400 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2024-11-19 22:12:54,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:12:54,400 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2024-11-19 22:12:54,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-19 22:12:54,400 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2024-11-19 22:12:54,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-19 22:12:54,401 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:12:54,401 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:12:54,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 22:12:54,402 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:12:54,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:12:54,403 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2024-11-19 22:12:54,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:12:54,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364751561] [2024-11-19 22:12:54,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:12:54,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:12:54,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:54,516 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:54,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:54,565 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:54,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 22:12:54,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:12:54,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364751561] [2024-11-19 22:12:54,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364751561] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 22:12:54,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941403676] [2024-11-19 22:12:54,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:12:54,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:12:54,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:12:54,599 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 22:12:54,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 22:12:54,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:54,633 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 22:12:54,637 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 22:12:54,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 22:12:54,690 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 22:12:54,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 22:12:54,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941403676] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 22:12:54,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 22:12:54,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2024-11-19 22:12:54,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819579876] [2024-11-19 22:12:54,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 22:12:54,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 22:12:54,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:12:54,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 22:12:54,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-19 22:12:54,871 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-19 22:12:54,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:12:54,923 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2024-11-19 22:12:54,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 22:12:54,924 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 16 [2024-11-19 22:12:54,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:12:54,924 INFO L225 Difference]: With dead ends: 22 [2024-11-19 22:12:54,925 INFO L226 Difference]: Without dead ends: 18 [2024-11-19 22:12:54,925 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-19 22:12:54,926 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 22:12:54,927 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 37 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 22:12:54,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-19 22:12:54,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-19 22:12:54,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-19 22:12:54,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2024-11-19 22:12:54,932 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2024-11-19 22:12:54,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:12:54,933 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2024-11-19 22:12:54,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-19 22:12:54,933 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2024-11-19 22:12:54,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-19 22:12:54,934 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:12:54,935 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:12:54,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-19 22:12:55,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:12:55,139 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:12:55,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:12:55,139 INFO L85 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2024-11-19 22:12:55,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:12:55,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927752916] [2024-11-19 22:12:55,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:12:55,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:12:55,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:55,179 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:55,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:55,244 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:55,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:55,283 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:55,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:55,302 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-19 22:12:55,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:12:55,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927752916] [2024-11-19 22:12:55,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927752916] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 22:12:55,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310234355] [2024-11-19 22:12:55,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 22:12:55,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:12:55,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:12:55,308 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 22:12:55,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 22:12:55,341 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 22:12:55,341 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 22:12:55,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 22:12:55,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 22:12:55,382 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-19 22:12:55,382 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 22:12:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 22:12:55,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310234355] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 22:12:55,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 22:12:55,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 12 [2024-11-19 22:12:55,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714548410] [2024-11-19 22:12:55,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 22:12:55,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 22:12:55,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:12:55,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 22:12:55,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-19 22:12:55,661 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-19 22:12:55,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:12:55,707 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2024-11-19 22:12:55,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 22:12:55,707 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 22 [2024-11-19 22:12:55,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:12:55,708 INFO L225 Difference]: With dead ends: 25 [2024-11-19 22:12:55,708 INFO L226 Difference]: Without dead ends: 21 [2024-11-19 22:12:55,709 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-19 22:12:55,709 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 22:12:55,710 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 44 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 22:12:55,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-19 22:12:55,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-19 22:12:55,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-19 22:12:55,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2024-11-19 22:12:55,714 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2024-11-19 22:12:55,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:12:55,714 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2024-11-19 22:12:55,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-19 22:12:55,714 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2024-11-19 22:12:55,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-19 22:12:55,715 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:12:55,715 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:12:55,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 22:12:55,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-19 22:12:55,915 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:12:55,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:12:55,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2024-11-19 22:12:55,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:12:55,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670091891] [2024-11-19 22:12:55,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:12:55,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:12:55,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:55,977 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:56,026 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:56,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:56,062 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:56,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:56,081 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:56,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:56,097 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-19 22:12:56,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:12:56,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670091891] [2024-11-19 22:12:56,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670091891] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 22:12:56,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516883690] [2024-11-19 22:12:56,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 22:12:56,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:12:56,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:12:56,100 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 22:12:56,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 22:12:56,136 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-19 22:12:56,136 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 22:12:56,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 22:12:56,138 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 22:12:56,185 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-19 22:12:56,185 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 22:12:56,575 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-19 22:12:56,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516883690] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 22:12:56,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 22:12:56,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 14 [2024-11-19 22:12:56,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563795202] [2024-11-19 22:12:56,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 22:12:56,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 22:12:56,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:12:56,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 22:12:56,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-11-19 22:12:56,578 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-19 22:12:56,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:12:56,627 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2024-11-19 22:12:56,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 22:12:56,628 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) Word has length 28 [2024-11-19 22:12:56,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:12:56,628 INFO L225 Difference]: With dead ends: 28 [2024-11-19 22:12:56,628 INFO L226 Difference]: Without dead ends: 24 [2024-11-19 22:12:56,629 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2024-11-19 22:12:56,629 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 22:12:56,630 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 51 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 22:12:56,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-19 22:12:56,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-19 22:12:56,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-19 22:12:56,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-11-19 22:12:56,633 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2024-11-19 22:12:56,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:12:56,633 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-11-19 22:12:56,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-19 22:12:56,633 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-11-19 22:12:56,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-19 22:12:56,634 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:12:56,634 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:12:56,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 22:12:56,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:12:56,835 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:12:56,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:12:56,836 INFO L85 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2024-11-19 22:12:56,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:12:56,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114957036] [2024-11-19 22:12:56,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:12:56,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:12:56,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:56,881 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:56,936 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:56,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:56,970 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:56,989 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:56,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:57,007 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:57,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:57,021 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-19 22:12:57,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:12:57,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114957036] [2024-11-19 22:12:57,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114957036] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 22:12:57,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608330713] [2024-11-19 22:12:57,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 22:12:57,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:12:57,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:12:57,024 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 22:12:57,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 22:12:57,062 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 22:12:57,062 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 22:12:57,063 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 22:12:57,064 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 22:12:57,117 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-19 22:12:57,117 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 22:12:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-19 22:12:57,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608330713] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 22:12:57,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 22:12:57,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 16 [2024-11-19 22:12:57,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479059978] [2024-11-19 22:12:57,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 22:12:57,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-19 22:12:57,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:12:57,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-19 22:12:57,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2024-11-19 22:12:57,708 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2024-11-19 22:12:57,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:12:57,777 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2024-11-19 22:12:57,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 22:12:57,778 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) Word has length 34 [2024-11-19 22:12:57,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:12:57,779 INFO L225 Difference]: With dead ends: 31 [2024-11-19 22:12:57,779 INFO L226 Difference]: Without dead ends: 27 [2024-11-19 22:12:57,779 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2024-11-19 22:12:57,781 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 41 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 22:12:57,781 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 60 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 22:12:57,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-19 22:12:57,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-19 22:12:57,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-19 22:12:57,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2024-11-19 22:12:57,785 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2024-11-19 22:12:57,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:12:57,786 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2024-11-19 22:12:57,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2024-11-19 22:12:57,786 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2024-11-19 22:12:57,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-19 22:12:57,789 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:12:57,789 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:12:57,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 22:12:57,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:12:57,990 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:12:57,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:12:57,990 INFO L85 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2024-11-19 22:12:57,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:12:57,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264026074] [2024-11-19 22:12:57,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:12:57,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:12:57,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:58,040 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:58,090 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:58,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:58,129 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:58,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:58,164 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:58,184 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:58,199 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:58,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:58,212 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-19 22:12:58,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:12:58,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264026074] [2024-11-19 22:12:58,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264026074] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 22:12:58,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022789676] [2024-11-19 22:12:58,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 22:12:58,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:12:58,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:12:58,215 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 22:12:58,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 22:12:58,257 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-19 22:12:58,258 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 22:12:58,258 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 22:12:58,260 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 22:12:58,304 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-19 22:12:58,304 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 22:12:59,118 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-19 22:12:59,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022789676] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 22:12:59,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 22:12:59,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 18 [2024-11-19 22:12:59,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978565487] [2024-11-19 22:12:59,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 22:12:59,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 22:12:59,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:12:59,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 22:12:59,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2024-11-19 22:12:59,120 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2024-11-19 22:12:59,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:12:59,180 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2024-11-19 22:12:59,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 22:12:59,181 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 40 [2024-11-19 22:12:59,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:12:59,182 INFO L225 Difference]: With dead ends: 34 [2024-11-19 22:12:59,182 INFO L226 Difference]: Without dead ends: 30 [2024-11-19 22:12:59,182 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 77 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2024-11-19 22:12:59,183 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 13 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 22:12:59,183 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 82 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 22:12:59,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-19 22:12:59,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-19 22:12:59,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-19 22:12:59,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2024-11-19 22:12:59,187 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2024-11-19 22:12:59,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:12:59,187 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2024-11-19 22:12:59,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2024-11-19 22:12:59,187 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2024-11-19 22:12:59,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-19 22:12:59,188 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:12:59,188 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:12:59,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 22:12:59,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:12:59,389 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:12:59,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:12:59,390 INFO L85 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2024-11-19 22:12:59,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:12:59,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910472227] [2024-11-19 22:12:59,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:12:59,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:12:59,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:59,447 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:59,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:59,497 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:59,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:59,541 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:59,567 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:59,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:59,587 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:59,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:59,603 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:59,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:59,619 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:59,632 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-19 22:12:59,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:12:59,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910472227] [2024-11-19 22:12:59,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910472227] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 22:12:59,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129605914] [2024-11-19 22:12:59,632 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 22:12:59,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:12:59,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:12:59,634 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 22:12:59,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 22:12:59,689 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-19 22:12:59,689 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 22:12:59,690 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 22:12:59,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 22:12:59,737 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-19 22:12:59,737 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 22:13:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-19 22:13:00,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129605914] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 22:13:00,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 22:13:00,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 20 [2024-11-19 22:13:00,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514139965] [2024-11-19 22:13:00,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 22:13:00,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 22:13:00,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:13:00,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 22:13:00,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2024-11-19 22:13:00,848 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2024-11-19 22:13:00,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:13:00,928 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2024-11-19 22:13:00,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 22:13:00,928 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) Word has length 46 [2024-11-19 22:13:00,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:13:00,929 INFO L225 Difference]: With dead ends: 37 [2024-11-19 22:13:00,929 INFO L226 Difference]: Without dead ends: 33 [2024-11-19 22:13:00,929 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 89 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2024-11-19 22:13:00,930 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 22:13:00,930 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 69 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 22:13:00,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-19 22:13:00,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-19 22:13:00,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-19 22:13:00,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-11-19 22:13:00,933 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2024-11-19 22:13:00,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:13:00,934 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-11-19 22:13:00,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2024-11-19 22:13:00,934 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-11-19 22:13:00,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-19 22:13:00,934 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:13:00,934 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:13:00,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-19 22:13:01,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:13:01,135 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:13:01,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:13:01,135 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2024-11-19 22:13:01,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:13:01,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116653722] [2024-11-19 22:13:01,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:13:01,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:13:01,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:01,184 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:01,238 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:01,275 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:01,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:01,317 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:01,344 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:01,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:01,366 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:01,385 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:01,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:01,401 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:01,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:01,416 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-11-19 22:13:01,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:13:01,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116653722] [2024-11-19 22:13:01,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116653722] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 22:13:01,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391046414] [2024-11-19 22:13:01,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 22:13:01,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:13:01,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:13:01,419 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 22:13:01,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 22:13:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:01,491 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-19 22:13:01,492 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 22:13:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-11-19 22:13:01,556 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 22:13:02,979 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-19 22:13:02,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391046414] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 22:13:02,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 22:13:02,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 22 [2024-11-19 22:13:02,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579629937] [2024-11-19 22:13:02,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 22:13:02,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-19 22:13:02,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:13:02,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-19 22:13:02,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2024-11-19 22:13:02,980 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2024-11-19 22:13:03,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:13:03,059 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2024-11-19 22:13:03,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 22:13:03,059 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) Word has length 52 [2024-11-19 22:13:03,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:13:03,060 INFO L225 Difference]: With dead ends: 40 [2024-11-19 22:13:03,060 INFO L226 Difference]: Without dead ends: 36 [2024-11-19 22:13:03,064 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 101 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=556, Unknown=0, NotChecked=0, Total=812 [2024-11-19 22:13:03,065 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 17 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 22:13:03,065 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 82 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 22:13:03,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-19 22:13:03,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-19 22:13:03,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-19 22:13:03,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2024-11-19 22:13:03,068 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2024-11-19 22:13:03,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:13:03,069 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2024-11-19 22:13:03,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2024-11-19 22:13:03,069 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2024-11-19 22:13:03,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-19 22:13:03,069 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:13:03,070 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:13:03,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-19 22:13:03,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:13:03,274 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:13:03,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:13:03,274 INFO L85 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2024-11-19 22:13:03,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:13:03,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18588997] [2024-11-19 22:13:03,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:13:03,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:13:03,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:03,331 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:03,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:03,405 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:03,450 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:03,489 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:03,518 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:03,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:03,542 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:03,563 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:03,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:03,601 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:03,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:03,625 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:03,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-19 22:13:03,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:13:03,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18588997] [2024-11-19 22:13:03,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18588997] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 22:13:03,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620560771] [2024-11-19 22:13:03,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 22:13:03,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:13:03,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:13:03,641 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 22:13:03,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 22:13:03,730 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 22:13:03,731 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 22:13:03,731 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 22:13:03,733 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 22:13:03,801 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-19 22:13:03,801 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 22:13:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-19 22:13:05,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620560771] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 22:13:05,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 22:13:05,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 24 [2024-11-19 22:13:05,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139075522] [2024-11-19 22:13:05,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 22:13:05,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-19 22:13:05,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:13:05,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-19 22:13:05,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2024-11-19 22:13:05,874 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2024-11-19 22:13:05,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:13:05,963 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2024-11-19 22:13:05,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 22:13:05,964 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) Word has length 58 [2024-11-19 22:13:05,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:13:05,964 INFO L225 Difference]: With dead ends: 43 [2024-11-19 22:13:05,964 INFO L226 Difference]: Without dead ends: 39 [2024-11-19 22:13:05,965 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 113 SyntacticMatches, 9 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=314, Invalid=678, Unknown=0, NotChecked=0, Total=992 [2024-11-19 22:13:05,966 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 68 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 22:13:05,966 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 81 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 22:13:05,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-19 22:13:05,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-19 22:13:05,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2024-11-19 22:13:05,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2024-11-19 22:13:05,970 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2024-11-19 22:13:05,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:13:05,970 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2024-11-19 22:13:05,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2024-11-19 22:13:05,970 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2024-11-19 22:13:05,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-19 22:13:05,971 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:13:05,971 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:13:05,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-19 22:13:06,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-19 22:13:06,173 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:13:06,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:13:06,173 INFO L85 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2024-11-19 22:13:06,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:13:06,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377525864] [2024-11-19 22:13:06,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:13:06,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:13:06,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:06,239 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:06,305 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:06,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:06,351 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:06,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:06,391 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:06,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:06,429 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:06,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:06,467 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:06,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:06,492 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:06,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:06,513 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:06,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:06,531 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:06,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:06,546 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:06,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:06,560 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-11-19 22:13:06,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:13:06,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377525864] [2024-11-19 22:13:06,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377525864] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 22:13:06,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674161883] [2024-11-19 22:13:06,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 22:13:06,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:13:06,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:13:06,562 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 22:13:06,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 22:13:06,682 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-19 22:13:06,682 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 22:13:06,683 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-19 22:13:06,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 22:13:06,737 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-11-19 22:13:06,737 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 22:13:09,302 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-19 22:13:09,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674161883] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 22:13:09,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 22:13:09,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 26 [2024-11-19 22:13:09,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902854505] [2024-11-19 22:13:09,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 22:13:09,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-19 22:13:09,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:13:09,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-19 22:13:09,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2024-11-19 22:13:09,304 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 26 states, 24 states have (on average 2.125) internal successors, (51), 26 states have internal predecessors, (51), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2024-11-19 22:13:09,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:13:09,397 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2024-11-19 22:13:09,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 22:13:09,397 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.125) internal successors, (51), 26 states have internal predecessors, (51), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) Word has length 64 [2024-11-19 22:13:09,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:13:09,398 INFO L225 Difference]: With dead ends: 46 [2024-11-19 22:13:09,398 INFO L226 Difference]: Without dead ends: 42 [2024-11-19 22:13:09,398 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 125 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=812, Unknown=0, NotChecked=0, Total=1190 [2024-11-19 22:13:09,399 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 22:13:09,399 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 91 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 22:13:09,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-19 22:13:09,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-11-19 22:13:09,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-19 22:13:09,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2024-11-19 22:13:09,403 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2024-11-19 22:13:09,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:13:09,403 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2024-11-19 22:13:09,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.125) internal successors, (51), 26 states have internal predecessors, (51), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2024-11-19 22:13:09,403 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2024-11-19 22:13:09,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-19 22:13:09,404 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:13:09,404 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:13:09,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-19 22:13:09,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-19 22:13:09,608 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:13:09,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:13:09,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2024-11-19 22:13:09,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:13:09,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247525591] [2024-11-19 22:13:09,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:13:09,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:13:09,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:09,677 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:09,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:09,740 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:09,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:09,792 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:09,842 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:09,904 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:09,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:09,948 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:09,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:09,985 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:09,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:10,009 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:10,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:10,037 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:10,055 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:10,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:10,071 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-11-19 22:13:10,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:13:10,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247525591] [2024-11-19 22:13:10,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247525591] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 22:13:10,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537439886] [2024-11-19 22:13:10,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 22:13:10,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:13:10,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:13:10,090 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 22:13:10,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 22:13:10,246 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 22:13:10,246 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 22:13:10,247 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-19 22:13:10,249 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 22:13:10,313 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-11-19 22:13:10,313 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 22:13:13,676 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-19 22:13:13,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537439886] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 22:13:13,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 22:13:13,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 25] total 28 [2024-11-19 22:13:13,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139921357] [2024-11-19 22:13:13,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 22:13:13,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-19 22:13:13,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:13:13,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-19 22:13:13,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2024-11-19 22:13:13,678 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 28 states have internal predecessors, (55), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2024-11-19 22:13:13,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:13:13,795 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2024-11-19 22:13:13,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-19 22:13:13,796 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 28 states have internal predecessors, (55), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) Word has length 70 [2024-11-19 22:13:13,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:13:13,797 INFO L225 Difference]: With dead ends: 49 [2024-11-19 22:13:13,797 INFO L226 Difference]: Without dead ends: 45 [2024-11-19 22:13:13,797 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 137 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=448, Invalid=958, Unknown=0, NotChecked=0, Total=1406 [2024-11-19 22:13:13,797 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 73 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 22:13:13,798 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 107 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 22:13:13,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-19 22:13:13,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-11-19 22:13:13,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2024-11-19 22:13:13,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2024-11-19 22:13:13,806 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2024-11-19 22:13:13,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:13:13,806 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2024-11-19 22:13:13,806 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 28 states have internal predecessors, (55), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2024-11-19 22:13:13,806 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2024-11-19 22:13:13,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-19 22:13:13,809 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:13:13,809 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:13:13,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-19 22:13:14,009 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-19 22:13:14,013 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:13:14,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:13:14,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2024-11-19 22:13:14,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:13:14,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914006719] [2024-11-19 22:13:14,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:13:14,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:13:14,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:14,084 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:14,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:14,170 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:14,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:14,226 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:14,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:14,273 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:14,318 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:14,356 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:14,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:14,389 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:14,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:14,425 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:14,450 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:14,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:14,470 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:14,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:14,489 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:14,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:14,506 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:14,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:14,521 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-11-19 22:13:14,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:13:14,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914006719] [2024-11-19 22:13:14,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914006719] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 22:13:14,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712400840] [2024-11-19 22:13:14,522 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 22:13:14,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:13:14,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:13:14,524 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 22:13:14,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 22:13:14,734 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-11-19 22:13:14,734 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 22:13:14,735 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-19 22:13:14,736 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 22:13:14,801 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-11-19 22:13:14,801 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 22:13:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-19 22:13:19,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712400840] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 22:13:19,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 22:13:19,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 27] total 30 [2024-11-19 22:13:19,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161031335] [2024-11-19 22:13:19,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 22:13:19,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-19 22:13:19,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:13:19,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-19 22:13:19,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2024-11-19 22:13:19,244 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 30 states have internal predecessors, (59), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2024-11-19 22:13:19,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:13:19,357 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2024-11-19 22:13:19,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-19 22:13:19,357 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 30 states have internal predecessors, (59), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) Word has length 76 [2024-11-19 22:13:19,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:13:19,358 INFO L225 Difference]: With dead ends: 52 [2024-11-19 22:13:19,358 INFO L226 Difference]: Without dead ends: 48 [2024-11-19 22:13:19,358 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 149 SyntacticMatches, 12 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2024-11-19 22:13:19,359 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 63 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 22:13:19,359 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 105 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 22:13:19,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-19 22:13:19,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-11-19 22:13:19,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-19 22:13:19,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2024-11-19 22:13:19,367 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2024-11-19 22:13:19,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:13:19,367 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2024-11-19 22:13:19,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 30 states have internal predecessors, (59), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2024-11-19 22:13:19,368 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2024-11-19 22:13:19,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-19 22:13:19,371 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:13:19,371 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:13:19,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-19 22:13:19,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-19 22:13:19,575 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:13:19,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:13:19,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2024-11-19 22:13:19,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:13:19,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345954268] [2024-11-19 22:13:19,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:13:19,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:13:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:19,667 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:19,744 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:19,805 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:19,864 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:19,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:19,911 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:19,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:19,960 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:19,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:19,996 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:20,027 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:20,065 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:20,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:20,094 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:20,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:20,118 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:20,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:20,137 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:20,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:20,154 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:20,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:20,174 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-11-19 22:13:20,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:13:20,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345954268] [2024-11-19 22:13:20,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345954268] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 22:13:20,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003721983] [2024-11-19 22:13:20,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 22:13:20,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:13:20,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:13:20,176 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 22:13:20,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 22:13:20,455 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-11-19 22:13:20,456 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 22:13:20,457 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-19 22:13:20,458 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 22:13:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-11-19 22:13:20,531 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 22:13:26,162 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-19 22:13:26,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003721983] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 22:13:26,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 22:13:26,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 29] total 32 [2024-11-19 22:13:26,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32703416] [2024-11-19 22:13:26,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 22:13:26,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-19 22:13:26,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:13:26,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-19 22:13:26,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2024-11-19 22:13:26,167 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 32 states, 30 states have (on average 2.1) internal successors, (63), 32 states have internal predecessors, (63), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2024-11-19 22:13:26,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:13:26,299 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2024-11-19 22:13:26,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-19 22:13:26,299 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.1) internal successors, (63), 32 states have internal predecessors, (63), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) Word has length 82 [2024-11-19 22:13:26,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:13:26,300 INFO L225 Difference]: With dead ends: 55 [2024-11-19 22:13:26,300 INFO L226 Difference]: Without dead ends: 51 [2024-11-19 22:13:26,300 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 161 SyntacticMatches, 13 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=606, Invalid=1286, Unknown=0, NotChecked=0, Total=1892 [2024-11-19 22:13:26,301 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 95 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 22:13:26,301 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 104 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 22:13:26,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-19 22:13:26,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-19 22:13:26,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-19 22:13:26,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2024-11-19 22:13:26,304 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2024-11-19 22:13:26,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:13:26,304 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2024-11-19 22:13:26,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.1) internal successors, (63), 32 states have internal predecessors, (63), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2024-11-19 22:13:26,304 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2024-11-19 22:13:26,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-19 22:13:26,305 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:13:26,305 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:13:26,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-19 22:13:26,509 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-19 22:13:26,510 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:13:26,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:13:26,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2024-11-19 22:13:26,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:13:26,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224515508] [2024-11-19 22:13:26,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:13:26,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:13:26,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:26,587 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:26,661 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:26,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:26,742 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:26,800 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:26,851 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:26,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:26,909 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:26,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:26,950 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:26,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:26,988 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:27,037 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:27,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:27,064 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:27,088 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:27,110 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:27,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:27,128 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:27,145 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:27,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:27,161 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-11-19 22:13:27,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:13:27,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224515508] [2024-11-19 22:13:27,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224515508] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 22:13:27,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836851180] [2024-11-19 22:13:27,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 22:13:27,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:13:27,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:13:27,163 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 22:13:27,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-19 22:13:27,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:27,514 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-19 22:13:27,515 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 22:13:27,586 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-11-19 22:13:27,587 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 22:13:34,826 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-19 22:13:34,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836851180] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 22:13:34,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 22:13:34,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 31] total 34 [2024-11-19 22:13:34,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822715294] [2024-11-19 22:13:34,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 22:13:34,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-19 22:13:34,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:13:34,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-19 22:13:34,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2024-11-19 22:13:34,827 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 34 states, 32 states have (on average 2.09375) internal successors, (67), 34 states have internal predecessors, (67), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2024-11-19 22:13:34,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:13:34,979 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2024-11-19 22:13:34,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-19 22:13:34,980 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.09375) internal successors, (67), 34 states have internal predecessors, (67), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) Word has length 88 [2024-11-19 22:13:34,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:13:34,981 INFO L225 Difference]: With dead ends: 58 [2024-11-19 22:13:34,981 INFO L226 Difference]: Without dead ends: 54 [2024-11-19 22:13:34,981 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 173 SyntacticMatches, 14 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=694, Invalid=1468, Unknown=0, NotChecked=0, Total=2162 [2024-11-19 22:13:34,982 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 165 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 22:13:34,982 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 114 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 22:13:34,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-19 22:13:34,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-19 22:13:34,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (16), 15 states have call predecessors, (16), 2 states have call successors, (16) [2024-11-19 22:13:34,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2024-11-19 22:13:34,986 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2024-11-19 22:13:34,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:13:34,986 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2024-11-19 22:13:34,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.09375) internal successors, (67), 34 states have internal predecessors, (67), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2024-11-19 22:13:34,986 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2024-11-19 22:13:34,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-19 22:13:34,987 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:13:34,987 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:13:34,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-19 22:13:35,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-19 22:13:35,190 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:13:35,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:13:35,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2024-11-19 22:13:35,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:13:35,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375804312] [2024-11-19 22:13:35,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:13:35,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:13:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:35,274 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:35,364 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:35,462 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:35,523 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:35,577 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:35,629 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:35,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:35,671 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:35,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:35,730 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:35,767 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:35,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:35,797 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:35,822 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:35,845 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:35,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:35,867 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:35,886 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:35,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:35,903 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:35,920 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2024-11-19 22:13:35,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:13:35,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375804312] [2024-11-19 22:13:35,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375804312] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 22:13:35,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761126322] [2024-11-19 22:13:35,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 22:13:35,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:13:35,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:13:35,923 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 22:13:35,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-19 22:13:36,330 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 22:13:36,330 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 22:13:36,331 INFO L255 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-19 22:13:36,332 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 22:13:36,401 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2024-11-19 22:13:36,401 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 22:13:45,328 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-19 22:13:45,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761126322] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 22:13:45,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 22:13:45,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 33] total 36 [2024-11-19 22:13:45,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462900996] [2024-11-19 22:13:45,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 22:13:45,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-19 22:13:45,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:13:45,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-19 22:13:45,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=934, Unknown=0, NotChecked=0, Total=1260 [2024-11-19 22:13:45,330 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 36 states, 34 states have (on average 2.088235294117647) internal successors, (71), 36 states have internal predecessors, (71), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) [2024-11-19 22:13:45,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:13:45,493 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2024-11-19 22:13:45,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-19 22:13:45,493 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.088235294117647) internal successors, (71), 36 states have internal predecessors, (71), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) Word has length 94 [2024-11-19 22:13:45,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:13:45,494 INFO L225 Difference]: With dead ends: 61 [2024-11-19 22:13:45,494 INFO L226 Difference]: Without dead ends: 57 [2024-11-19 22:13:45,495 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 185 SyntacticMatches, 15 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2024-11-19 22:13:45,497 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 175 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 22:13:45,497 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 116 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 22:13:45,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-19 22:13:45,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-11-19 22:13:45,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2024-11-19 22:13:45,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2024-11-19 22:13:45,505 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2024-11-19 22:13:45,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:13:45,505 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2024-11-19 22:13:45,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.088235294117647) internal successors, (71), 36 states have internal predecessors, (71), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) [2024-11-19 22:13:45,505 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2024-11-19 22:13:45,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-19 22:13:45,506 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:13:45,506 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:13:45,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-19 22:13:45,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:13:45,707 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:13:45,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:13:45,707 INFO L85 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2024-11-19 22:13:45,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:13:45,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071465202] [2024-11-19 22:13:45,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:13:45,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:13:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:45,794 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:45,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:45,901 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:45,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:45,972 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:46,037 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:46,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:46,097 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:46,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:46,166 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:46,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:46,220 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:46,262 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:46,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:46,300 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:46,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:46,337 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:46,367 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:46,394 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:46,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:46,418 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:46,439 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:46,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:46,458 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:46,475 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:46,492 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-11-19 22:13:46,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:13:46,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071465202] [2024-11-19 22:13:46,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071465202] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 22:13:46,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184795192] [2024-11-19 22:13:46,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 22:13:46,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:13:46,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:13:46,494 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 22:13:46,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-19 22:13:47,000 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-19 22:13:47,000 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 22:13:47,001 INFO L255 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-19 22:13:47,003 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 22:13:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-11-19 22:13:47,066 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 22:13:57,997 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-19 22:13:57,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184795192] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 22:13:57,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 22:13:57,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 35] total 38 [2024-11-19 22:13:57,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702583959] [2024-11-19 22:13:57,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 22:13:57,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-19 22:13:57,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:13:57,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-19 22:13:57,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1043, Unknown=0, NotChecked=0, Total=1406 [2024-11-19 22:13:57,999 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 38 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 38 states have internal predecessors, (75), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) [2024-11-19 22:13:58,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:13:58,158 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2024-11-19 22:13:58,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-19 22:13:58,159 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 38 states have internal predecessors, (75), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) Word has length 100 [2024-11-19 22:13:58,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:13:58,159 INFO L225 Difference]: With dead ends: 64 [2024-11-19 22:13:58,159 INFO L226 Difference]: Without dead ends: 60 [2024-11-19 22:13:58,160 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 197 SyntacticMatches, 16 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=888, Invalid=1868, Unknown=0, NotChecked=0, Total=2756 [2024-11-19 22:13:58,161 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 66 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 22:13:58,161 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 134 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 22:13:58,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-19 22:13:58,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-11-19 22:13:58,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (18), 17 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-19 22:13:58,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2024-11-19 22:13:58,168 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2024-11-19 22:13:58,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:13:58,168 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2024-11-19 22:13:58,168 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 38 states have internal predecessors, (75), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) [2024-11-19 22:13:58,168 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2024-11-19 22:13:58,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-19 22:13:58,169 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:13:58,169 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:13:58,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-19 22:13:58,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-19 22:13:58,369 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:13:58,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:13:58,370 INFO L85 PathProgramCache]: Analyzing trace with hash 317812044, now seen corresponding path program 16 times [2024-11-19 22:13:58,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:13:58,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379931245] [2024-11-19 22:13:58,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:13:58,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:13:58,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:58,462 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:58,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:58,555 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:58,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:58,670 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:58,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:58,741 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:58,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:58,804 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:58,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:58,866 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:58,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:58,919 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:58,967 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:58,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:59,009 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:59,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:59,046 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:59,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:59,091 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:59,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:59,118 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:59,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:59,141 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:59,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:59,161 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:59,180 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:59,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:59,197 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:59,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:59,211 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:59,227 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-11-19 22:13:59,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:13:59,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379931245] [2024-11-19 22:13:59,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379931245] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 22:13:59,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350975308] [2024-11-19 22:13:59,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 22:13:59,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:13:59,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:13:59,228 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 22:13:59,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-19 22:13:59,853 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 22:13:59,853 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 22:13:59,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-19 22:13:59,856 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 22:13:59,921 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-11-19 22:13:59,921 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 22:14:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-11-19 22:14:13,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350975308] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 22:14:13,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 22:14:13,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 37] total 40 [2024-11-19 22:14:13,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16885141] [2024-11-19 22:14:13,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 22:14:13,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-19 22:14:13,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:14:13,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-19 22:14:13,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=1158, Unknown=0, NotChecked=0, Total=1560 [2024-11-19 22:14:13,333 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 40 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 40 states have internal predecessors, (79), 20 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (50), 17 states have call predecessors, (50), 20 states have call successors, (50) [2024-11-19 22:14:13,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:14:13,506 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2024-11-19 22:14:13,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-19 22:14:13,507 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 40 states have internal predecessors, (79), 20 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (50), 17 states have call predecessors, (50), 20 states have call successors, (50) Word has length 106 [2024-11-19 22:14:13,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:14:13,507 INFO L225 Difference]: With dead ends: 67 [2024-11-19 22:14:13,507 INFO L226 Difference]: Without dead ends: 63 [2024-11-19 22:14:13,508 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 209 SyntacticMatches, 17 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=994, Invalid=2086, Unknown=0, NotChecked=0, Total=3080 [2024-11-19 22:14:13,509 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 47 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 22:14:13,509 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 128 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 22:14:13,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-19 22:14:13,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-11-19 22:14:13,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 43 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2024-11-19 22:14:13,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2024-11-19 22:14:13,512 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2024-11-19 22:14:13,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:14:13,512 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2024-11-19 22:14:13,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 40 states have internal predecessors, (79), 20 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (50), 17 states have call predecessors, (50), 20 states have call successors, (50) [2024-11-19 22:14:13,513 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2024-11-19 22:14:13,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-19 22:14:13,515 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:14:13,515 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:14:13,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-19 22:14:13,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-19 22:14:13,716 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:14:13,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:14:13,716 INFO L85 PathProgramCache]: Analyzing trace with hash -2122437418, now seen corresponding path program 17 times [2024-11-19 22:14:13,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:14:13,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243011271] [2024-11-19 22:14:13,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:14:13,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:14:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:14:13,829 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:14:13,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:14:13,934 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:14:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:14:14,035 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:14:14,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:14:14,110 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:14:14,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:14:14,180 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:14:14,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:14:14,243 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:14:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:14:14,302 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:14:14,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:14:14,361 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:14:14,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:14:14,409 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:14:14,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:14:14,466 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:14:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:14:14,504 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:14:14,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:14:14,537 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:14:14,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:14:14,573 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:14:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:14:14,601 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:14:14,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:14:14,626 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:14:14,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:14:14,646 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:14:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:14:14,663 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:14:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:14:14,677 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:14:14,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:14:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2024-11-19 22:14:14,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:14:14,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243011271] [2024-11-19 22:14:14,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243011271] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 22:14:14,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826021848] [2024-11-19 22:14:14,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 22:14:14,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:14:14,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:14:14,693 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 22:14:14,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-19 22:14:15,471 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2024-11-19 22:14:15,471 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 22:14:15,472 INFO L255 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-19 22:14:15,473 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 22:14:15,541 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2024-11-19 22:14:15,541 INFO L311 TraceCheckSpWp]: Computing backward predicates...