./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/fibo_2calls_4-1.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/fibo_2calls_4-1.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 0724aefed4fd629206cc51e19e964e04af92729823366947a0cfe01fe4e4d102 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-19 22:11:09,729 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 22:11:09,790 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-19 22:11:09,795 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 22:11:09,796 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 22:11:09,822 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 22:11:09,823 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 22:11:09,824 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 22:11:09,824 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 22:11:09,825 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 22:11:09,825 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 22:11:09,825 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 22:11:09,826 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 22:11:09,827 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 22:11:09,828 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 22:11:09,828 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 22:11:09,843 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 22:11:09,844 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 22:11:09,844 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 22:11:09,845 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 22:11:09,845 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 22:11:09,845 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 22:11:09,845 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 22:11:09,845 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 22:11:09,846 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 22:11:09,846 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 22:11:09,847 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 22:11:09,847 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 22:11:09,847 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 22:11:09,847 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 22:11:09,847 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 22:11:09,848 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 22:11:09,848 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 22:11:09,848 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 22:11:09,849 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 22:11:09,849 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 22:11:09,849 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 22:11:09,849 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 22:11:09,849 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 22:11:09,850 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 22:11:09,850 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 22:11:09,850 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 22:11:09,850 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0724aefed4fd629206cc51e19e964e04af92729823366947a0cfe01fe4e4d102 [2024-11-19 22:11:10,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 22:11:10,069 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 22:11:10,073 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 22:11:10,074 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 22:11:10,074 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 22:11:10,075 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2024-11-19 22:11:11,392 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 22:11:11,533 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 22:11:11,535 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2024-11-19 22:11:11,545 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5c539324/583b55fb0f134942926180b3e27f201a/FLAGd983693bb [2024-11-19 22:11:11,562 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5c539324/583b55fb0f134942926180b3e27f201a [2024-11-19 22:11:11,564 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 22:11:11,565 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 22:11:11,568 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 22:11:11,568 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 22:11:11,572 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 22:11:11,572 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:11:11" (1/1) ... [2024-11-19 22:11:11,573 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33b99199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:11:11, skipping insertion in model container [2024-11-19 22:11:11,573 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:11:11" (1/1) ... [2024-11-19 22:11:11,589 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 22:11:11,735 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/fibo_2calls_4-1.c[946,959] [2024-11-19 22:11:11,738 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 22:11:11,746 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 22:11:11,759 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/fibo_2calls_4-1.c[946,959] [2024-11-19 22:11:11,760 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 22:11:11,773 INFO L204 MainTranslator]: Completed translation [2024-11-19 22:11:11,774 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:11:11 WrapperNode [2024-11-19 22:11:11,774 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 22:11:11,775 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 22:11:11,775 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 22:11:11,775 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 22:11:11,781 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:11:11" (1/1) ... [2024-11-19 22:11:11,785 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:11:11" (1/1) ... [2024-11-19 22:11:11,796 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2024-11-19 22:11:11,797 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 22:11:11,798 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 22:11:11,798 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 22:11:11,798 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 22:11:11,806 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:11:11" (1/1) ... [2024-11-19 22:11:11,806 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:11:11" (1/1) ... [2024-11-19 22:11:11,807 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:11:11" (1/1) ... [2024-11-19 22:11:11,814 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 22:11:11,815 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:11:11" (1/1) ... [2024-11-19 22:11:11,815 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:11:11" (1/1) ... [2024-11-19 22:11:11,820 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:11:11" (1/1) ... [2024-11-19 22:11:11,821 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:11:11" (1/1) ... [2024-11-19 22:11:11,822 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:11:11" (1/1) ... [2024-11-19 22:11:11,823 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:11:11" (1/1) ... [2024-11-19 22:11:11,824 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 22:11:11,825 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 22:11:11,825 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 22:11:11,825 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 22:11:11,826 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:11:11" (1/1) ... [2024-11-19 22:11:11,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 22:11:11,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:11:11,856 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 22:11:11,861 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 22:11:11,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 22:11:11,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 22:11:11,896 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2024-11-19 22:11:11,897 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2024-11-19 22:11:11,897 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2024-11-19 22:11:11,897 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2024-11-19 22:11:11,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 22:11:11,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 22:11:11,943 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 22:11:11,945 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 22:11:12,029 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-11-19 22:11:12,029 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 22:11:12,038 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 22:11:12,038 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-19 22:11:12,039 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:11:12 BoogieIcfgContainer [2024-11-19 22:11:12,039 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 22:11:12,040 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 22:11:12,040 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 22:11:12,043 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 22:11:12,043 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 10:11:11" (1/3) ... [2024-11-19 22:11:12,044 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec6821c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 10:11:12, skipping insertion in model container [2024-11-19 22:11:12,045 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:11:11" (2/3) ... [2024-11-19 22:11:12,045 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec6821c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 10:11:12, skipping insertion in model container [2024-11-19 22:11:12,045 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:11:12" (3/3) ... [2024-11-19 22:11:12,046 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-1.c [2024-11-19 22:11:12,062 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 22:11:12,062 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-19 22:11:12,113 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 22:11:12,117 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;@267733c3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 22:11:12,118 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-19 22:11:12,121 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-19 22:11:12,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-19 22:11:12,126 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:11:12,126 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:11:12,126 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:11:12,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:11:12,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2024-11-19 22:11:12,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:11:12,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529075417] [2024-11-19 22:11:12,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:11:12,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:11:12,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:12,268 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:11:12,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:12,316 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 22:11:12,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:11:12,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529075417] [2024-11-19 22:11:12,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529075417] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 22:11:12,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 22:11:12,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 22:11:12,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516825949] [2024-11-19 22:11:12,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 22:11:12,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 22:11:12,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:11:12,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 22:11:12,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 22:11:12,369 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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 22:11:12,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:11:12,495 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2024-11-19 22:11:12,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 22:11:12,498 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 22:11:12,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:11:12,505 INFO L225 Difference]: With dead ends: 41 [2024-11-19 22:11:12,505 INFO L226 Difference]: Without dead ends: 29 [2024-11-19 22:11:12,507 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 22:11:12,509 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 10 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 22:11:12,510 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 97 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 22:11:12,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-19 22:11:12,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-11-19 22:11:12,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-19 22:11:12,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-11-19 22:11:12,541 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2024-11-19 22:11:12,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:11:12,541 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-11-19 22:11:12,542 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 22:11:12,542 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-11-19 22:11:12,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-19 22:11:12,543 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:11:12,543 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:11:12,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 22:11:12,543 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:11:12,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:11:12,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2024-11-19 22:11:12,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:11:12,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023650806] [2024-11-19 22:11:12,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:11:12,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:11:12,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:12,593 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:11:12,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:12,632 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 22:11:12,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:11:12,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023650806] [2024-11-19 22:11:12,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023650806] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 22:11:12,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 22:11:12,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 22:11:12,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870125985] [2024-11-19 22:11:12,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 22:11:12,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 22:11:12,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:11:12,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 22:11:12,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 22:11:12,635 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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 22:11:12,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:11:12,699 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2024-11-19 22:11:12,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 22:11:12,700 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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 11 [2024-11-19 22:11:12,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:11:12,701 INFO L225 Difference]: With dead ends: 33 [2024-11-19 22:11:12,701 INFO L226 Difference]: Without dead ends: 29 [2024-11-19 22:11:12,701 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 22:11:12,702 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 22:11:12,703 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 80 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 22:11:12,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-19 22:11:12,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-11-19 22:11:12,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-19 22:11:12,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-11-19 22:11:12,714 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2024-11-19 22:11:12,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:11:12,714 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-11-19 22:11:12,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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 22:11:12,714 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-11-19 22:11:12,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-19 22:11:12,715 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:11:12,717 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:11:12,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 22:11:12,717 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:11:12,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:11:12,719 INFO L85 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2024-11-19 22:11:12,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:11:12,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813483113] [2024-11-19 22:11:12,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:11:12,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:11:12,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:12,783 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:11:12,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:12,841 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-19 22:11:12,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:12,882 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-19 22:11:12,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:12,892 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 22:11:12,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:11:12,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813483113] [2024-11-19 22:11:12,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813483113] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 22:11:12,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093568798] [2024-11-19 22:11:12,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:11:12,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:11:12,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:11:12,899 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 22:11:12,901 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 22:11:12,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:12,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 22:11:12,942 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 22:11:13,033 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 22:11:13,034 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 22:11:13,206 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 22:11:13,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093568798] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 22:11:13,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 22:11:13,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2024-11-19 22:11:13,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007739780] [2024-11-19 22:11:13,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 22:11:13,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 22:11:13,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:11:13,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 22:11:13,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-19 22:11:13,211 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-19 22:11:13,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:11:13,324 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2024-11-19 22:11:13,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 22:11:13,324 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2024-11-19 22:11:13,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:11:13,325 INFO L225 Difference]: With dead ends: 55 [2024-11-19 22:11:13,325 INFO L226 Difference]: Without dead ends: 31 [2024-11-19 22:11:13,326 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-11-19 22:11:13,326 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 19 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 22:11:13,327 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 163 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 22:11:13,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-19 22:11:13,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2024-11-19 22:11:13,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-19 22:11:13,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2024-11-19 22:11:13,332 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2024-11-19 22:11:13,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:11:13,332 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2024-11-19 22:11:13,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-19 22:11:13,332 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2024-11-19 22:11:13,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-19 22:11:13,333 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:11:13,333 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:11:13,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 22:11:13,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:11:13,534 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:11:13,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:11:13,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2024-11-19 22:11:13,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:11:13,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343928901] [2024-11-19 22:11:13,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:11:13,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:11:13,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:13,582 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:11:13,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:13,650 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-19 22:11:13,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:13,685 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-19 22:11:13,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:13,694 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 22:11:13,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:11:13,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343928901] [2024-11-19 22:11:13,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343928901] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 22:11:13,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91803739] [2024-11-19 22:11:13,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:11:13,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:11:13,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:11:13,700 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 22:11:13,704 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 22:11:13,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:13,739 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 22:11:13,740 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 22:11:13,791 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 22:11:13,791 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 22:11:14,056 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 22:11:14,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91803739] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 22:11:14,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 22:11:14,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2024-11-19 22:11:14,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768517193] [2024-11-19 22:11:14,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 22:11:14,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 22:11:14,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:11:14,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 22:11:14,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-11-19 22:11:14,062 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-19 22:11:14,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:11:14,191 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2024-11-19 22:11:14,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 22:11:14,192 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) Word has length 24 [2024-11-19 22:11:14,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:11:14,194 INFO L225 Difference]: With dead ends: 53 [2024-11-19 22:11:14,194 INFO L226 Difference]: Without dead ends: 49 [2024-11-19 22:11:14,194 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-11-19 22:11:14,195 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 36 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 22:11:14,195 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 123 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 22:11:14,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-19 22:11:14,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2024-11-19 22:11:14,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 33 states have internal predecessors, (39), 9 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (17), 9 states have call predecessors, (17), 9 states have call successors, (17) [2024-11-19 22:11:14,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 65 transitions. [2024-11-19 22:11:14,203 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 65 transitions. Word has length 24 [2024-11-19 22:11:14,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:11:14,203 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 65 transitions. [2024-11-19 22:11:14,203 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-19 22:11:14,204 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 65 transitions. [2024-11-19 22:11:14,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-19 22:11:14,205 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:11:14,205 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:11:14,211 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 22:11:14,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-19 22:11:14,410 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:11:14,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:11:14,411 INFO L85 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2024-11-19 22:11:14,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:11:14,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49476662] [2024-11-19 22:11:14,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:11:14,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:11:14,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:14,446 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:11:14,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:14,461 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-19 22:11:14,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:14,478 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-19 22:11:14,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:14,491 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-19 22:11:14,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:14,493 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-19 22:11:14,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-19 22:11:14,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:11:14,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49476662] [2024-11-19 22:11:14,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49476662] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 22:11:14,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341310309] [2024-11-19 22:11:14,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:11:14,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:11:14,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:11:14,497 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 22:11:14,498 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 22:11:14,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:14,534 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 22:11:14,536 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 22:11:14,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 22:11:14,586 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 22:11:14,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 22:11:14,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341310309] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 22:11:14,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 22:11:14,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 15 [2024-11-19 22:11:14,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462881728] [2024-11-19 22:11:14,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 22:11:14,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-19 22:11:14,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:11:14,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-19 22:11:14,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-11-19 22:11:14,812 INFO L87 Difference]: Start difference. First operand 47 states and 65 transitions. Second operand has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2024-11-19 22:11:14,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:11:14,980 INFO L93 Difference]: Finished difference Result 109 states and 177 transitions. [2024-11-19 22:11:14,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 22:11:14,981 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2024-11-19 22:11:14,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:11:14,983 INFO L225 Difference]: With dead ends: 109 [2024-11-19 22:11:14,983 INFO L226 Difference]: Without dead ends: 65 [2024-11-19 22:11:14,988 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2024-11-19 22:11:14,988 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 32 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 22:11:14,989 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 192 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 22:11:14,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-19 22:11:15,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2024-11-19 22:11:15,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 44 states have internal predecessors, (51), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (29), 13 states have call predecessors, (29), 12 states have call successors, (29) [2024-11-19 22:11:15,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2024-11-19 22:11:15,010 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 36 [2024-11-19 22:11:15,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:11:15,010 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2024-11-19 22:11:15,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2024-11-19 22:11:15,010 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2024-11-19 22:11:15,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-19 22:11:15,011 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:11:15,012 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:11:15,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-19 22:11:15,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:11:15,216 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:11:15,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:11:15,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1167294498, now seen corresponding path program 1 times [2024-11-19 22:11:15,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:11:15,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459939482] [2024-11-19 22:11:15,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:11:15,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:11:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:15,272 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:11:15,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:15,290 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-19 22:11:15,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:15,332 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-19 22:11:15,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:15,339 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-19 22:11:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:15,346 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-19 22:11:15,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-19 22:11:15,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:11:15,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459939482] [2024-11-19 22:11:15,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459939482] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 22:11:15,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502132274] [2024-11-19 22:11:15,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:11:15,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:11:15,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:11:15,370 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 22:11:15,376 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 22:11:15,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:15,413 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 22:11:15,414 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 22:11:15,517 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-19 22:11:15,517 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 22:11:15,850 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 22:11:15,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502132274] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 22:11:15,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 22:11:15,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2024-11-19 22:11:15,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459486655] [2024-11-19 22:11:15,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 22:11:15,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 22:11:15,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:11:15,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 22:11:15,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-11-19 22:11:15,852 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand has 17 states, 16 states have (on average 3.0625) internal successors, (49), 17 states have internal predecessors, (49), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (12), 6 states have call predecessors, (12), 10 states have call successors, (12) [2024-11-19 22:11:16,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:11:16,096 INFO L93 Difference]: Finished difference Result 179 states and 325 transitions. [2024-11-19 22:11:16,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-19 22:11:16,096 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 17 states have internal predecessors, (49), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (12), 6 states have call predecessors, (12), 10 states have call successors, (12) Word has length 37 [2024-11-19 22:11:16,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:11:16,098 INFO L225 Difference]: With dead ends: 179 [2024-11-19 22:11:16,099 INFO L226 Difference]: Without dead ends: 119 [2024-11-19 22:11:16,100 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 77 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2024-11-19 22:11:16,100 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 35 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 22:11:16,100 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 228 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 22:11:16,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-19 22:11:16,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 100. [2024-11-19 22:11:16,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 64 states have (on average 1.21875) internal successors, (78), 67 states have internal predecessors, (78), 21 states have call successors, (21), 7 states have call predecessors, (21), 14 states have return successors, (63), 25 states have call predecessors, (63), 21 states have call successors, (63) [2024-11-19 22:11:16,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 162 transitions. [2024-11-19 22:11:16,115 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 162 transitions. Word has length 37 [2024-11-19 22:11:16,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:11:16,116 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 162 transitions. [2024-11-19 22:11:16,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 17 states have internal predecessors, (49), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (12), 6 states have call predecessors, (12), 10 states have call successors, (12) [2024-11-19 22:11:16,116 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 162 transitions. [2024-11-19 22:11:16,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-19 22:11:16,118 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:11:16,118 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:11:16,126 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 22:11:16,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:11:16,319 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:11:16,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:11:16,320 INFO L85 PathProgramCache]: Analyzing trace with hash 384535367, now seen corresponding path program 1 times [2024-11-19 22:11:16,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:11:16,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717385925] [2024-11-19 22:11:16,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:11:16,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:11:16,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:16,355 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:11:16,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:16,376 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-19 22:11:16,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:16,419 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-19 22:11:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:16,461 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-19 22:11:16,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:16,465 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-19 22:11:16,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:16,469 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-19 22:11:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:16,480 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-19 22:11:16,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:16,483 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 22:11:16,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:11:16,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717385925] [2024-11-19 22:11:16,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717385925] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 22:11:16,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799197576] [2024-11-19 22:11:16,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:11:16,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:11:16,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:11:16,486 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 22:11:16,491 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 22:11:16,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:16,530 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 22:11:16,531 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 22:11:16,592 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-19 22:11:16,592 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 22:11:16,851 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-19 22:11:16,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799197576] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 22:11:16,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 22:11:16,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 16 [2024-11-19 22:11:16,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666203540] [2024-11-19 22:11:16,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 22:11:16,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-19 22:11:16,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:11:16,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-19 22:11:16,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2024-11-19 22:11:16,853 INFO L87 Difference]: Start difference. First operand 100 states and 162 transitions. Second operand has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 16 states have internal predecessors, (53), 10 states have call successors, (15), 1 states have call predecessors, (15), 6 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) [2024-11-19 22:11:17,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:11:17,058 INFO L93 Difference]: Finished difference Result 262 states and 510 transitions. [2024-11-19 22:11:17,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-19 22:11:17,059 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 16 states have internal predecessors, (53), 10 states have call successors, (15), 1 states have call predecessors, (15), 6 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) Word has length 51 [2024-11-19 22:11:17,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:11:17,061 INFO L225 Difference]: With dead ends: 262 [2024-11-19 22:11:17,061 INFO L226 Difference]: Without dead ends: 165 [2024-11-19 22:11:17,062 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2024-11-19 22:11:17,063 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 30 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 22:11:17,063 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 203 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 22:11:17,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-11-19 22:11:17,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 139. [2024-11-19 22:11:17,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 89 states have (on average 1.202247191011236) internal successors, (107), 91 states have internal predecessors, (107), 31 states have call successors, (31), 10 states have call predecessors, (31), 18 states have return successors, (103), 37 states have call predecessors, (103), 31 states have call successors, (103) [2024-11-19 22:11:17,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 241 transitions. [2024-11-19 22:11:17,081 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 241 transitions. Word has length 51 [2024-11-19 22:11:17,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:11:17,081 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 241 transitions. [2024-11-19 22:11:17,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 16 states have internal predecessors, (53), 10 states have call successors, (15), 1 states have call predecessors, (15), 6 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) [2024-11-19 22:11:17,082 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 241 transitions. [2024-11-19 22:11:17,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-19 22:11:17,084 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:11:17,084 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:11:17,094 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 22:11:17,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:11:17,288 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:11:17,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:11:17,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1130362923, now seen corresponding path program 1 times [2024-11-19 22:11:17,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:11:17,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948022393] [2024-11-19 22:11:17,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:11:17,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:11:17,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:17,313 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:11:17,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:17,341 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-19 22:11:17,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:17,378 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-19 22:11:17,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:17,420 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-19 22:11:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:17,423 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-19 22:11:17,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:17,426 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-19 22:11:17,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:17,429 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-19 22:11:17,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:17,441 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-19 22:11:17,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:11:17,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948022393] [2024-11-19 22:11:17,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948022393] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 22:11:17,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157734532] [2024-11-19 22:11:17,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:11:17,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:11:17,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:11:17,443 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 22:11:17,444 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 22:11:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:17,484 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 22:11:17,485 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 22:11:17,549 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-19 22:11:17,550 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 22:11:17,696 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-19 22:11:17,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157734532] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 22:11:17,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 22:11:17,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 17 [2024-11-19 22:11:17,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13994593] [2024-11-19 22:11:17,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 22:11:17,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 22:11:17,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:11:17,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 22:11:17,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-11-19 22:11:17,698 INFO L87 Difference]: Start difference. First operand 139 states and 241 transitions. Second operand has 17 states, 16 states have (on average 3.3125) internal successors, (53), 17 states have internal predecessors, (53), 8 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2024-11-19 22:11:17,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:11:17,943 INFO L93 Difference]: Finished difference Result 344 states and 697 transitions. [2024-11-19 22:11:17,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-19 22:11:17,944 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 17 states have internal predecessors, (53), 8 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) Word has length 52 [2024-11-19 22:11:17,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:11:17,945 INFO L225 Difference]: With dead ends: 344 [2024-11-19 22:11:17,945 INFO L226 Difference]: Without dead ends: 117 [2024-11-19 22:11:17,947 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2024-11-19 22:11:17,947 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 43 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 22:11:17,948 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 236 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 22:11:17,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-19 22:11:17,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 94. [2024-11-19 22:11:17,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 61 states have (on average 1.180327868852459) internal successors, (72), 62 states have internal predecessors, (72), 20 states have call successors, (20), 7 states have call predecessors, (20), 12 states have return successors, (64), 24 states have call predecessors, (64), 20 states have call successors, (64) [2024-11-19 22:11:17,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 156 transitions. [2024-11-19 22:11:17,959 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 156 transitions. Word has length 52 [2024-11-19 22:11:17,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:11:17,959 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 156 transitions. [2024-11-19 22:11:17,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 17 states have internal predecessors, (53), 8 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2024-11-19 22:11:17,960 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 156 transitions. [2024-11-19 22:11:17,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-19 22:11:17,961 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:11:17,961 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:11:17,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-19 22:11:18,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:11:18,166 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:11:18,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:11:18,167 INFO L85 PathProgramCache]: Analyzing trace with hash 780870354, now seen corresponding path program 1 times [2024-11-19 22:11:18,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:11:18,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514816883] [2024-11-19 22:11:18,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:11:18,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:11:18,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:18,254 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:11:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:18,327 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-19 22:11:18,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:18,368 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-19 22:11:18,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:18,408 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-19 22:11:18,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:18,422 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-19 22:11:18,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:18,437 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-19 22:11:18,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:18,443 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-19 22:11:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:18,492 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-19 22:11:18,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:18,497 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-19 22:11:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:18,513 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-19 22:11:18,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:11:18,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514816883] [2024-11-19 22:11:18,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514816883] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 22:11:18,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794605956] [2024-11-19 22:11:18,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:11:18,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:11:18,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:11:18,519 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 22:11:18,520 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 22:11:18,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:18,558 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-19 22:11:18,559 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 22:11:18,660 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-19 22:11:18,661 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 22:11:18,873 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-19 22:11:18,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794605956] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 22:11:18,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 22:11:18,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 21 [2024-11-19 22:11:18,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098757530] [2024-11-19 22:11:18,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 22:11:18,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-19 22:11:18,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:11:18,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-19 22:11:18,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2024-11-19 22:11:18,875 INFO L87 Difference]: Start difference. First operand 94 states and 156 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (12), 12 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-19 22:11:19,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:11:19,010 INFO L93 Difference]: Finished difference Result 149 states and 268 transitions. [2024-11-19 22:11:19,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-19 22:11:19,011 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (12), 12 states have call predecessors, (12), 4 states have call successors, (12) Word has length 65 [2024-11-19 22:11:19,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:11:19,015 INFO L225 Difference]: With dead ends: 149 [2024-11-19 22:11:19,015 INFO L226 Difference]: Without dead ends: 145 [2024-11-19 22:11:19,016 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2024-11-19 22:11:19,016 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 22:11:19,016 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 641 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 22:11:19,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-11-19 22:11:19,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 106. [2024-11-19 22:11:19,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 68 states have (on average 1.161764705882353) internal successors, (79), 70 states have internal predecessors, (79), 22 states have call successors, (22), 7 states have call predecessors, (22), 15 states have return successors, (86), 28 states have call predecessors, (86), 22 states have call successors, (86) [2024-11-19 22:11:19,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 187 transitions. [2024-11-19 22:11:19,054 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 187 transitions. Word has length 65 [2024-11-19 22:11:19,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:11:19,054 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 187 transitions. [2024-11-19 22:11:19,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (12), 12 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-19 22:11:19,054 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 187 transitions. [2024-11-19 22:11:19,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-19 22:11:19,055 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:11:19,055 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:11:19,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-19 22:11:19,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:11:19,257 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:11:19,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:11:19,258 INFO L85 PathProgramCache]: Analyzing trace with hash 464780624, now seen corresponding path program 2 times [2024-11-19 22:11:19,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:11:19,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999844496] [2024-11-19 22:11:19,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:11:19,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:11:19,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:19,351 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:11:19,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:19,443 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-19 22:11:19,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:19,488 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-19 22:11:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:19,531 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-19 22:11:19,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:19,551 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-19 22:11:19,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:19,554 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-19 22:11:19,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:19,561 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-19 22:11:19,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:19,636 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-19 22:11:19,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:19,673 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-19 22:11:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:19,676 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-19 22:11:19,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:19,678 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-19 22:11:19,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:19,683 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-19 22:11:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:19,684 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-19 22:11:19,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 36 proven. 81 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2024-11-19 22:11:19,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:11:19,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999844496] [2024-11-19 22:11:19,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999844496] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 22:11:19,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572440347] [2024-11-19 22:11:19,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 22:11:19,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:11:19,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:11:19,688 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 22:11:19,689 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 22:11:19,733 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 22:11:19,734 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 22:11:19,734 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 22:11:19,736 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 22:11:19,811 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 59 proven. 37 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2024-11-19 22:11:19,812 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 22:11:20,254 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 59 proven. 41 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-19 22:11:20,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572440347] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 22:11:20,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 22:11:20,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 11] total 24 [2024-11-19 22:11:20,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309182515] [2024-11-19 22:11:20,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 22:11:20,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-19 22:11:20,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:11:20,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-19 22:11:20,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2024-11-19 22:11:20,257 INFO L87 Difference]: Start difference. First operand 106 states and 187 transitions. Second operand has 24 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 24 states have internal predecessors, (71), 16 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (26), 14 states have call predecessors, (26), 16 states have call successors, (26) [2024-11-19 22:11:20,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:11:20,548 INFO L93 Difference]: Finished difference Result 208 states and 383 transitions. [2024-11-19 22:11:20,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-19 22:11:20,549 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 24 states have internal predecessors, (71), 16 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (26), 14 states have call predecessors, (26), 16 states have call successors, (26) Word has length 93 [2024-11-19 22:11:20,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:11:20,550 INFO L225 Difference]: With dead ends: 208 [2024-11-19 22:11:20,550 INFO L226 Difference]: Without dead ends: 92 [2024-11-19 22:11:20,552 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 198 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2024-11-19 22:11:20,552 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 52 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 22:11:20,552 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 245 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 22:11:20,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-19 22:11:20,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2024-11-19 22:11:20,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 56 states have internal predecessors, (65), 14 states have call successors, (14), 8 states have call predecessors, (14), 12 states have return successors, (34), 18 states have call predecessors, (34), 14 states have call successors, (34) [2024-11-19 22:11:20,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 113 transitions. [2024-11-19 22:11:20,560 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 113 transitions. Word has length 93 [2024-11-19 22:11:20,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:11:20,560 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 113 transitions. [2024-11-19 22:11:20,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 24 states have internal predecessors, (71), 16 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (26), 14 states have call predecessors, (26), 16 states have call successors, (26) [2024-11-19 22:11:20,561 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 113 transitions. [2024-11-19 22:11:20,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-19 22:11:20,561 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:11:20,561 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:11:20,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-19 22:11:20,762 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,SelfDestructingSolverStorable9 [2024-11-19 22:11:20,763 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:11:20,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:11:20,763 INFO L85 PathProgramCache]: Analyzing trace with hash -492645000, now seen corresponding path program 3 times [2024-11-19 22:11:20,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:11:20,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071351912] [2024-11-19 22:11:20,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:11:20,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:11:20,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:20,790 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:11:20,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:20,854 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-19 22:11:20,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:20,895 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-19 22:11:20,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:20,929 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-19 22:11:20,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:20,947 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-19 22:11:20,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:20,951 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-19 22:11:20,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:20,957 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-19 22:11:20,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:20,975 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-19 22:11:20,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:20,988 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-19 22:11:20,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:21,018 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 37 proven. 23 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 22:11:21,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:11:21,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071351912] [2024-11-19 22:11:21,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071351912] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 22:11:21,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482119624] [2024-11-19 22:11:21,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 22:11:21,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:11:21,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:11:21,023 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 22:11:21,025 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 22:11:21,066 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 22:11:21,066 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 22:11:21,067 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 22:11:21,068 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 22:11:21,142 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-19 22:11:21,142 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 22:11:21,408 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-19 22:11:21,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482119624] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 22:11:21,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 22:11:21,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 9] total 22 [2024-11-19 22:11:21,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984000489] [2024-11-19 22:11:21,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 22:11:21,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-19 22:11:21,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:11:21,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-19 22:11:21,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2024-11-19 22:11:21,410 INFO L87 Difference]: Start difference. First operand 83 states and 113 transitions. Second operand has 22 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 22 states have internal predecessors, (69), 12 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (22), 14 states have call predecessors, (22), 12 states have call successors, (22) [2024-11-19 22:11:21,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:11:21,731 INFO L93 Difference]: Finished difference Result 182 states and 282 transitions. [2024-11-19 22:11:21,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-19 22:11:21,731 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 22 states have internal predecessors, (69), 12 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (22), 14 states have call predecessors, (22), 12 states have call successors, (22) Word has length 66 [2024-11-19 22:11:21,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:11:21,732 INFO L225 Difference]: With dead ends: 182 [2024-11-19 22:11:21,732 INFO L226 Difference]: Without dead ends: 97 [2024-11-19 22:11:21,733 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 139 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2024-11-19 22:11:21,734 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 69 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 22:11:21,734 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 255 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 22:11:21,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-19 22:11:21,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 81. [2024-11-19 22:11:21,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 54 states have internal predecessors, (62), 13 states have call successors, (13), 8 states have call predecessors, (13), 12 states have return successors, (33), 18 states have call predecessors, (33), 13 states have call successors, (33) [2024-11-19 22:11:21,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 108 transitions. [2024-11-19 22:11:21,740 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 108 transitions. Word has length 66 [2024-11-19 22:11:21,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:11:21,740 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 108 transitions. [2024-11-19 22:11:21,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 22 states have internal predecessors, (69), 12 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (22), 14 states have call predecessors, (22), 12 states have call successors, (22) [2024-11-19 22:11:21,741 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 108 transitions. [2024-11-19 22:11:21,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-19 22:11:21,741 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:11:21,741 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:11:21,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-19 22:11:21,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:11:21,942 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:11:21,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:11:21,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1851863125, now seen corresponding path program 1 times [2024-11-19 22:11:21,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:11:21,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711413532] [2024-11-19 22:11:21,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:11:21,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:11:21,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:21,979 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:11:21,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:22,003 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-19 22:11:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:22,022 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-19 22:11:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:22,051 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-19 22:11:22,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:22,110 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-19 22:11:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:22,113 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-19 22:11:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:22,115 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-19 22:11:22,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:22,118 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-19 22:11:22,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:22,129 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-11-19 22:11:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:22,133 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-19 22:11:22,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:22,135 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-19 22:11:22,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 38 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-19 22:11:22,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:11:22,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711413532] [2024-11-19 22:11:22,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711413532] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 22:11:22,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193489544] [2024-11-19 22:11:22,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:11:22,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:11:22,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:11:22,141 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 22:11:22,145 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 22:11:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:11:22,197 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 22:11:22,198 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 22:11:22,284 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 26 proven. 56 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-19 22:11:22,284 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 22:11:23,016 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 26 proven. 64 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-19 22:11:23,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193489544] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 22:11:23,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 22:11:23,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 13] total 22 [2024-11-19 22:11:23,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718834676] [2024-11-19 22:11:23,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 22:11:23,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-19 22:11:23,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:11:23,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-19 22:11:23,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2024-11-19 22:11:23,017 INFO L87 Difference]: Start difference. First operand 81 states and 108 transitions. Second operand has 22 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 22 states have internal predecessors, (69), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 9 states have call predecessors, (24), 17 states have call successors, (24) [2024-11-19 22:11:23,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:11:23,212 INFO L93 Difference]: Finished difference Result 150 states and 215 transitions. [2024-11-19 22:11:23,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-19 22:11:23,213 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 22 states have internal predecessors, (69), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 9 states have call predecessors, (24), 17 states have call successors, (24) Word has length 79 [2024-11-19 22:11:23,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:11:23,213 INFO L225 Difference]: With dead ends: 150 [2024-11-19 22:11:23,213 INFO L226 Difference]: Without dead ends: 0 [2024-11-19 22:11:23,214 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 166 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2024-11-19 22:11:23,214 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 18 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 22:11:23,214 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 267 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 22:11:23,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-19 22:11:23,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-19 22:11:23,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 22:11:23,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-19 22:11:23,215 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2024-11-19 22:11:23,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:11:23,215 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-19 22:11:23,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 22 states have internal predecessors, (69), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 9 states have call predecessors, (24), 17 states have call successors, (24) [2024-11-19 22:11:23,215 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-19 22:11:23,215 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-19 22:11:23,218 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-19 22:11:23,226 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 22:11:23,418 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,SelfDestructingSolverStorable11 [2024-11-19 22:11:23,421 INFO L407 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:11:23,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-19 22:11:24,536 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-19 22:11:24,554 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 10:11:24 BoogieIcfgContainer [2024-11-19 22:11:24,555 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-19 22:11:24,555 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-19 22:11:24,555 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-19 22:11:24,555 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-19 22:11:24,556 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:11:12" (3/4) ... [2024-11-19 22:11:24,557 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-19 22:11:24,560 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2024-11-19 22:11:24,560 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2024-11-19 22:11:24,562 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2024-11-19 22:11:24,563 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-11-19 22:11:24,563 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-19 22:11:24,563 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-19 22:11:24,644 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-11-19 22:11:24,644 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-11-19 22:11:24,644 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-19 22:11:24,644 INFO L158 Benchmark]: Toolchain (without parser) took 13079.50ms. Allocated memory was 213.9MB in the beginning and 400.6MB in the end (delta: 186.6MB). Free memory was 144.5MB in the beginning and 337.3MB in the end (delta: -192.8MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-19 22:11:24,645 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 142.6MB. Free memory is still 109.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-19 22:11:24,645 INFO L158 Benchmark]: CACSL2BoogieTranslator took 206.12ms. Allocated memory is still 213.9MB. Free memory was 144.3MB in the beginning and 132.1MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-19 22:11:24,645 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.85ms. Allocated memory is still 213.9MB. Free memory was 132.1MB in the beginning and 130.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-19 22:11:24,645 INFO L158 Benchmark]: Boogie Preprocessor took 26.26ms. Allocated memory is still 213.9MB. Free memory was 130.8MB in the beginning and 129.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-19 22:11:24,645 INFO L158 Benchmark]: RCFGBuilder took 213.86ms. Allocated memory is still 213.9MB. Free memory was 129.0MB in the beginning and 117.6MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-11-19 22:11:24,646 INFO L158 Benchmark]: TraceAbstraction took 12514.46ms. Allocated memory was 213.9MB in the beginning and 400.6MB in the end (delta: 186.6MB). Free memory was 117.0MB in the beginning and 341.5MB in the end (delta: -224.5MB). Peak memory consumption was 171.0MB. Max. memory is 16.1GB. [2024-11-19 22:11:24,646 INFO L158 Benchmark]: Witness Printer took 89.05ms. Allocated memory is still 400.6MB. Free memory was 341.5MB in the beginning and 337.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-19 22:11:24,647 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 142.6MB. Free memory is still 109.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 206.12ms. Allocated memory is still 213.9MB. Free memory was 144.3MB in the beginning and 132.1MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.85ms. Allocated memory is still 213.9MB. Free memory was 132.1MB in the beginning and 130.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.26ms. Allocated memory is still 213.9MB. Free memory was 130.8MB in the beginning and 129.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 213.86ms. Allocated memory is still 213.9MB. Free memory was 129.0MB in the beginning and 117.6MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 12514.46ms. Allocated memory was 213.9MB in the beginning and 400.6MB in the end (delta: 186.6MB). Free memory was 117.0MB in the beginning and 341.5MB in the end (delta: -224.5MB). Peak memory consumption was 171.0MB. Max. memory is 16.1GB. * Witness Printer took 89.05ms. Allocated memory is still 400.6MB. Free memory was 341.5MB in the beginning and 337.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 41]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 11.3s, OverallIterations: 12, TraceHistogramMax: 8, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 428 SdHoareTripleChecker+Valid, 1.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 351 mSDsluCounter, 2730 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2380 mSDsCounter, 309 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2876 IncrementalHoareTripleChecker+Invalid, 3185 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 309 mSolverCounterUnsat, 350 mSDtfsCounter, 2876 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1365 GetRequests, 1117 SyntacticMatches, 33 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=139occurred in iteration=7, InterpolantAutomatonStates: 169, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 142 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 6.0s InterpolantComputationTime, 1073 NumberOfCodeBlocks, 1045 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 1567 ConstructedInterpolants, 0 QuantifiedInterpolants, 3341 SizeOfPredicates, 21 NumberOfNonLiveVariables, 1294 ConjunctsInSsa, 111 ConjunctsInUnsatCore, 32 InterpolantComputations, 2 PerfectInterpolantSequences, 1371/1926 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 19]: Procedure Contract for fibo2 Derived contract for procedure fibo2. Ensures: (((((\result == 1) && (n == 1)) || (\result == 0)) || (1 < n)) && (((((\result == 1) && (n == 1)) || (n < 1)) || (3 < n)) || ((\result == 1) && (2 == n)))) - ProcedureContractResult [Line: 9]: Procedure Contract for fibo1 Derived contract for procedure fibo1. Ensures: (((((4 < n) || ((n == 1) && (\result == 1))) || (n < 1)) || ((3 <= n) && ((3 == n) || (3 == \result)))) && (((\result == 0) || ((n == 1) && (\result == 1))) || (2 < n))) RESULT: Ultimate proved your program to be correct! [2024-11-19 22:11:24,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE