./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/id_o200.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/id_o200.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 d03bd1f663815b2d7649a36366d573d68ceb56233e8a1c24e8a8623e8a524f12 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-19 22:12:29,083 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 22:12:29,160 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-19 22:12:29,165 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 22:12:29,167 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 22:12:29,190 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 22:12:29,192 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 22:12:29,192 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 22:12:29,193 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 22:12:29,194 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 22:12:29,194 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 22:12:29,194 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 22:12:29,195 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 22:12:29,195 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 22:12:29,196 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 22:12:29,196 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 22:12:29,197 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 22:12:29,197 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 22:12:29,197 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 22:12:29,197 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 22:12:29,197 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 22:12:29,199 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 22:12:29,201 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 22:12:29,201 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 22:12:29,201 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 22:12:29,201 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 22:12:29,202 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 22:12:29,202 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 22:12:29,202 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 22:12:29,202 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 22:12:29,202 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 22:12:29,202 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 22:12:29,202 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 22:12:29,203 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 22:12:29,203 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 22:12:29,203 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 22:12:29,203 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 22:12:29,203 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 22:12:29,203 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 22:12:29,203 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 22:12:29,203 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 22:12:29,205 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 22:12:29,205 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d03bd1f663815b2d7649a36366d573d68ceb56233e8a1c24e8a8623e8a524f12 [2024-11-19 22:12:29,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 22:12:29,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 22:12:29,445 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 22:12:29,446 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 22:12:29,446 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 22:12:29,448 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_o200.c [2024-11-19 22:12:30,702 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 22:12:30,902 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 22:12:30,902 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_o200.c [2024-11-19 22:12:30,908 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/566661773/f3221bbc046447bbbae629e0b63b9563/FLAG2062cfd1b [2024-11-19 22:12:31,289 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/566661773/f3221bbc046447bbbae629e0b63b9563 [2024-11-19 22:12:31,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 22:12:31,292 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 22:12:31,293 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 22:12:31,293 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 22:12:31,300 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 22:12:31,300 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:12:31" (1/1) ... [2024-11-19 22:12:31,301 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55fd3adf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:12:31, skipping insertion in model container [2024-11-19 22:12:31,301 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:12:31" (1/1) ... [2024-11-19 22:12:31,328 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 22:12:31,451 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/id_o200.c[518,531] [2024-11-19 22:12:31,457 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 22:12:31,468 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 22:12:31,479 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/id_o200.c[518,531] [2024-11-19 22:12:31,480 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 22:12:31,495 INFO L204 MainTranslator]: Completed translation [2024-11-19 22:12:31,496 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:12:31 WrapperNode [2024-11-19 22:12:31,496 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 22:12:31,497 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 22:12:31,497 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 22:12:31,497 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 22:12:31,502 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:12:31" (1/1) ... [2024-11-19 22:12:31,506 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:12:31" (1/1) ... [2024-11-19 22:12:31,518 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2024-11-19 22:12:31,519 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 22:12:31,519 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 22:12:31,519 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 22:12:31,519 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 22:12:31,528 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:12:31" (1/1) ... [2024-11-19 22:12:31,528 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:12:31" (1/1) ... [2024-11-19 22:12:31,529 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:12:31" (1/1) ... [2024-11-19 22:12:31,537 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-19 22:12:31,538 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:12:31" (1/1) ... [2024-11-19 22:12:31,538 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:12:31" (1/1) ... [2024-11-19 22:12:31,539 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:12:31" (1/1) ... [2024-11-19 22:12:31,540 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:12:31" (1/1) ... [2024-11-19 22:12:31,541 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:12:31" (1/1) ... [2024-11-19 22:12:31,541 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:12:31" (1/1) ... [2024-11-19 22:12:31,542 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 22:12:31,543 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 22:12:31,543 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 22:12:31,543 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 22:12:31,544 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:12:31" (1/1) ... [2024-11-19 22:12:31,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 22:12:31,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:12:31,572 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-19 22:12:31,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-19 22:12:31,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 22:12:31,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 22:12:31,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 22:12:31,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 22:12:31,610 INFO L130 BoogieDeclarations]: Found specification of procedure id [2024-11-19 22:12:31,610 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2024-11-19 22:12:31,654 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 22:12:31,656 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 22:12:31,732 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-11-19 22:12:31,732 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 22:12:31,744 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 22:12:31,744 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-19 22:12:31,745 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:12:31 BoogieIcfgContainer [2024-11-19 22:12:31,745 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 22:12:31,746 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 22:12:31,746 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 22:12:31,749 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 22:12:31,749 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 10:12:31" (1/3) ... [2024-11-19 22:12:31,749 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21142c91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 10:12:31, skipping insertion in model container [2024-11-19 22:12:31,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:12:31" (2/3) ... [2024-11-19 22:12:31,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21142c91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 10:12:31, skipping insertion in model container [2024-11-19 22:12:31,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:12:31" (3/3) ... [2024-11-19 22:12:31,751 INFO L112 eAbstractionObserver]: Analyzing ICFG id_o200.c [2024-11-19 22:12:31,763 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 22:12:31,763 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-19 22:12:31,807 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 22:12:31,812 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;@555db9c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 22:12:31,813 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-19 22:12:31,816 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 22:12:31,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-19 22:12:31,821 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:12:31,821 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:12:31,822 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:12:31,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:12:31,825 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2024-11-19 22:12:31,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:12:31,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948159595] [2024-11-19 22:12:31,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:12:31,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:12:31,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:31,997 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:32,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 22:12:32,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:12:32,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948159595] [2024-11-19 22:12:32,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948159595] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 22:12:32,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 22:12:32,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 22:12:32,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461973389] [2024-11-19 22:12:32,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 22:12:32,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 22:12:32,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:12:32,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 22:12:32,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 22:12:32,055 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-19 22:12:32,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:12:32,091 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2024-11-19 22:12:32,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 22:12:32,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-11-19 22:12:32,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:12:32,102 INFO L225 Difference]: With dead ends: 25 [2024-11-19 22:12:32,102 INFO L226 Difference]: Without dead ends: 15 [2024-11-19 22:12:32,104 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 22:12:32,107 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 22:12:32,108 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 22:12:32,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-19 22:12:32,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-11-19 22:12:32,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 22:12:32,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2024-11-19 22:12:32,138 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2024-11-19 22:12:32,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:12:32,138 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2024-11-19 22:12:32,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-19 22:12:32,139 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2024-11-19 22:12:32,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-19 22:12:32,140 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:12:32,140 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:12:32,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 22:12:32,141 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:12:32,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:12:32,142 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2024-11-19 22:12:32,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:12:32,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614410919] [2024-11-19 22:12:32,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:12:32,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:12:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:32,237 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:32,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:32,313 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:32,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:32,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 22:12:32,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:12:32,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614410919] [2024-11-19 22:12:32,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614410919] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 22:12:32,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289038819] [2024-11-19 22:12:32,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:12:32,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:12:32,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:12:32,397 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 22:12:32,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 22:12:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:32,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 22:12:32,452 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 22:12:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 22:12:32,497 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 22:12:32,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 22:12:32,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289038819] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 22:12:32,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 22:12:32,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-19 22:12:32,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032622248] [2024-11-19 22:12:32,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 22:12:32,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 22:12:32,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:12:32,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 22:12:32,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-19 22:12:32,612 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-19 22:12:32,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:12:32,646 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2024-11-19 22:12:32,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 22:12:32,646 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 16 [2024-11-19 22:12:32,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:12:32,647 INFO L225 Difference]: With dead ends: 27 [2024-11-19 22:12:32,647 INFO L226 Difference]: Without dead ends: 21 [2024-11-19 22:12:32,647 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-19 22:12:32,648 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 22:12:32,649 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 112 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 22:12:32,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-19 22:12:32,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-19 22:12:32,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-19 22:12:32,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2024-11-19 22:12:32,653 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2024-11-19 22:12:32,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:12:32,653 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2024-11-19 22:12:32,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-19 22:12:32,653 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2024-11-19 22:12:32,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-19 22:12:32,654 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:12:32,654 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:12:32,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-19 22:12:32,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:12:32,856 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:12:32,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:12:32,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 2 times [2024-11-19 22:12:32,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:12:32,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242609286] [2024-11-19 22:12:32,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:12:32,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:12:32,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:32,955 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:32,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:33,014 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:33,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:33,067 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:33,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:33,116 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:33,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-19 22:12:33,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:12:33,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242609286] [2024-11-19 22:12:33,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242609286] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 22:12:33,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971906022] [2024-11-19 22:12:33,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 22:12:33,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:12:33,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:12:33,149 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 22:12:33,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 22:12:33,190 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 22:12:33,190 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 22:12:33,191 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 22:12:33,193 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 22:12:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-19 22:12:33,286 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 22:12:33,575 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-19 22:12:33,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971906022] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 22:12:33,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 22:12:33,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2024-11-19 22:12:33,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333904063] [2024-11-19 22:12:33,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 22:12:33,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-19 22:12:33,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:12:33,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-19 22:12:33,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-11-19 22:12:33,577 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) [2024-11-19 22:12:33,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:12:33,745 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2024-11-19 22:12:33,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-19 22:12:33,745 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) Word has length 28 [2024-11-19 22:12:33,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:12:33,746 INFO L225 Difference]: With dead ends: 39 [2024-11-19 22:12:33,746 INFO L226 Difference]: Without dead ends: 33 [2024-11-19 22:12:33,747 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2024-11-19 22:12:33,747 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 22:12:33,748 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 193 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 22:12:33,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-19 22:12:33,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-19 22:12:33,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-19 22:12:33,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-11-19 22:12:33,754 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2024-11-19 22:12:33,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:12:33,754 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-11-19 22:12:33,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) [2024-11-19 22:12:33,754 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-11-19 22:12:33,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-19 22:12:33,755 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:12:33,756 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:12:33,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-19 22:12:33,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-19 22:12:33,957 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:12:33,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:12:33,957 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 3 times [2024-11-19 22:12:33,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:12:33,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84533892] [2024-11-19 22:12:33,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:12:33,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:12:33,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:34,063 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:34,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:34,128 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:34,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:34,181 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:34,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:34,237 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:34,278 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:34,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:34,315 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:34,354 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:34,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:34,389 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:34,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:34,409 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-11-19 22:12:34,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:12:34,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84533892] [2024-11-19 22:12:34,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84533892] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 22:12:34,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921328474] [2024-11-19 22:12:34,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 22:12:34,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:12:34,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:12:34,415 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 22:12:34,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 22:12:34,465 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-19 22:12:34,465 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 22:12:34,466 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-19 22:12:34,467 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 22:12:34,516 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-11-19 22:12:34,516 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 22:12:35,180 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-11-19 22:12:35,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921328474] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 22:12:35,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 22:12:35,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2024-11-19 22:12:35,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091211411] [2024-11-19 22:12:35,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 22:12:35,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-19 22:12:35,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:12:35,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-19 22:12:35,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2024-11-19 22:12:35,183 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 21 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2024-11-19 22:12:35,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:12:35,899 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2024-11-19 22:12:35,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-19 22:12:35,899 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 21 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) Word has length 52 [2024-11-19 22:12:35,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:12:35,900 INFO L225 Difference]: With dead ends: 63 [2024-11-19 22:12:35,900 INFO L226 Difference]: Without dead ends: 57 [2024-11-19 22:12:35,902 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=386, Invalid=1966, Unknown=0, NotChecked=0, Total=2352 [2024-11-19 22:12:35,902 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 22:12:35,903 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 452 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 22:12:35,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-19 22:12:35,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-11-19 22:12:35,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2024-11-19 22:12:35,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2024-11-19 22:12:35,912 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2024-11-19 22:12:35,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:12:35,912 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2024-11-19 22:12:35,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 21 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2024-11-19 22:12:35,913 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2024-11-19 22:12:35,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-19 22:12:35,914 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:12:35,914 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:12:35,922 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 22:12:36,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:12:36,119 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:12:36,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:12:36,119 INFO L85 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 4 times [2024-11-19 22:12:36,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:12:36,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556632133] [2024-11-19 22:12:36,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:12:36,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:12:36,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:36,335 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:36,501 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:36,635 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:36,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:36,752 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:36,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:36,875 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:36,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:36,961 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:36,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:37,052 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:37,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:37,135 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:37,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:37,207 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:37,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:37,279 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:37,339 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:37,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:37,398 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:37,468 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:37,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:37,523 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:37,581 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:37,633 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:12:37,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:12:37,661 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-11-19 22:12:37,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:12:37,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556632133] [2024-11-19 22:12:37,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556632133] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 22:12:37,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963920592] [2024-11-19 22:12:37,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 22:12:37,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:12:37,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:12:37,664 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 22:12:37,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 22:12:37,704 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 22:12:37,704 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 22:12:37,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-19 22:12:37,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 22:12:37,783 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-11-19 22:12:37,783 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 22:12:39,939 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-11-19 22:12:39,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963920592] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 22:12:39,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 22:12:39,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2024-11-19 22:12:39,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916079356] [2024-11-19 22:12:39,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 22:12:39,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-19 22:12:39,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:12:39,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-19 22:12:39,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=620, Invalid=4072, Unknown=0, NotChecked=0, Total=4692 [2024-11-19 22:12:39,949 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 37 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (32), 32 states have call predecessors, (32), 1 states have call successors, (32) [2024-11-19 22:12:51,040 WARN L286 SmtUtils]: Spent 9.19s on a formula simplification that was a NOOP. DAG size: 77 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-19 22:13:10,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:13:10,778 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2024-11-19 22:13:10,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-11-19 22:13:10,779 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 37 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (32), 32 states have call predecessors, (32), 1 states have call successors, (32) Word has length 100 [2024-11-19 22:13:10,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:13:10,781 INFO L225 Difference]: With dead ends: 111 [2024-11-19 22:13:10,781 INFO L226 Difference]: Without dead ends: 105 [2024-11-19 22:13:10,787 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 31.9s TimeCoverageRelationStatistics Valid=1530, Invalid=7782, Unknown=0, NotChecked=0, Total=9312 [2024-11-19 22:13:10,788 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-19 22:13:10,788 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1284 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-19 22:13:10,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-19 22:13:10,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2024-11-19 22:13:10,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 71 states have internal predecessors, (71), 2 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (33), 32 states have call predecessors, (33), 2 states have call successors, (33) [2024-11-19 22:13:10,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2024-11-19 22:13:10,806 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 100 [2024-11-19 22:13:10,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:13:10,807 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2024-11-19 22:13:10,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 37 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (32), 32 states have call predecessors, (32), 1 states have call successors, (32) [2024-11-19 22:13:10,807 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2024-11-19 22:13:10,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2024-11-19 22:13:10,809 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:13:10,809 INFO L215 NwaCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:13:10,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-19 22:13:11,009 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:13:11,010 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:13:11,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:13:11,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1665704854, now seen corresponding path program 5 times [2024-11-19 22:13:11,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:13:11,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183515255] [2024-11-19 22:13:11,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:13:11,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:13:11,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:11,550 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:11,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:11,957 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:12,329 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:12,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:12,654 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:12,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:12,975 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:13,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:13,271 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:13,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:13,733 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:13,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:13,984 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:14,274 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:14,562 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:14,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:14,765 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:14,954 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:14,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:15,165 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:15,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:15,326 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:15,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:15,494 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:15,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:15,639 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:15,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:15,778 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:15,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:15,953 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:15,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:16,122 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:16,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:16,281 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:16,415 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:16,522 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:16,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:16,626 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:16,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:16,732 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:16,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:16,838 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:16,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:16,953 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:16,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:17,048 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:17,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:17,141 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:17,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:17,236 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:17,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:17,327 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:17,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:17,418 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:17,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:17,506 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 22:13:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:13:17,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2024-11-19 22:13:17,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:13:17,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183515255] [2024-11-19 22:13:17,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183515255] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 22:13:17,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847996420] [2024-11-19 22:13:17,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 22:13:17,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 22:13:17,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:13:17,560 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 22:13:17,561 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 22:13:17,993 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2024-11-19 22:13:17,993 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 22:13:18,000 INFO L255 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 132 conjuncts are in the unsatisfiable core [2024-11-19 22:13:18,003 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 22:13:18,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2024-11-19 22:13:18,155 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 22:13:26,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2024-11-19 22:13:26,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847996420] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 22:13:26,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 22:13:26,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 133 [2024-11-19 22:13:26,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555419898] [2024-11-19 22:13:26,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 22:13:26,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2024-11-19 22:13:26,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:13:26,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2024-11-19 22:13:26,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2252, Invalid=15304, Unknown=0, NotChecked=0, Total=17556 [2024-11-19 22:13:26,388 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 133 states, 133 states have (on average 1.0451127819548873) internal successors, (139), 69 states have internal predecessors, (139), 1 states have call successors, (2), 1 states have call predecessors, (2), 64 states have return successors, (64), 64 states have call predecessors, (64), 1 states have call successors, (64) [2024-11-19 22:14:09,057 WARN L286 SmtUtils]: Spent 35.96s on a formula simplification that was a NOOP. DAG size: 159 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)