./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i20_o20-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/id_i20_o20-1.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 c3376ee309c42e8280cfc81381fd928e4a895fffc424cbfa81d01112976a2d85 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-11 20:59:56,535 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-11 20:59:56,596 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-11 20:59:56,600 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-11 20:59:56,600 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-11 20:59:56,630 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-11 20:59:56,630 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-11 20:59:56,631 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-11 20:59:56,632 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-11 20:59:56,633 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-11 20:59:56,634 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-11 20:59:56,634 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-11 20:59:56,635 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-11 20:59:56,635 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-11 20:59:56,638 INFO L153 SettingsManager]: * Use SBE=true [2024-11-11 20:59:56,638 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-11 20:59:56,639 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-11 20:59:56,639 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-11 20:59:56,639 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-11 20:59:56,639 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-11 20:59:56,640 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-11 20:59:56,640 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-11 20:59:56,640 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-11 20:59:56,641 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-11 20:59:56,641 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-11 20:59:56,641 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-11 20:59:56,641 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-11 20:59:56,641 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-11 20:59:56,642 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-11 20:59:56,642 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-11 20:59:56,642 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-11 20:59:56,642 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-11 20:59:56,642 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 20:59:56,643 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-11 20:59:56,643 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-11 20:59:56,643 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-11 20:59:56,643 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-11 20:59:56,643 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-11 20:59:56,644 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-11 20:59:56,644 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-11 20:59:56,644 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-11 20:59:56,645 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-11 20:59:56,645 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3376ee309c42e8280cfc81381fd928e4a895fffc424cbfa81d01112976a2d85 [2024-11-11 20:59:56,932 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-11 20:59:56,958 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-11 20:59:56,960 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-11 20:59:56,962 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-11 20:59:56,962 INFO L274 PluginConnector]: CDTParser initialized [2024-11-11 20:59:56,963 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_i20_o20-1.c [2024-11-11 20:59:58,431 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-11 20:59:58,618 INFO L384 CDTParser]: Found 1 translation units. [2024-11-11 20:59:58,619 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i20_o20-1.c [2024-11-11 20:59:58,629 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c64eeecaa/1273ba193a204b1895c38fb688618fac/FLAGfe634caed [2024-11-11 20:59:59,012 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c64eeecaa/1273ba193a204b1895c38fb688618fac [2024-11-11 20:59:59,014 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-11 20:59:59,015 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-11 20:59:59,016 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-11 20:59:59,017 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-11 20:59:59,023 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-11 20:59:59,024 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 08:59:59" (1/1) ... [2024-11-11 20:59:59,025 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50eb9ab0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:59:59, skipping insertion in model container [2024-11-11 20:59:59,025 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 08:59:59" (1/1) ... [2024-11-11 20:59:59,048 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-11 20:59:59,227 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_i20_o20-1.c[454,467] [2024-11-11 20:59:59,231 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 20:59:59,241 INFO L200 MainTranslator]: Completed pre-run [2024-11-11 20:59:59,253 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_i20_o20-1.c[454,467] [2024-11-11 20:59:59,254 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 20:59:59,270 INFO L204 MainTranslator]: Completed translation [2024-11-11 20:59:59,271 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:59:59 WrapperNode [2024-11-11 20:59:59,271 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-11 20:59:59,272 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-11 20:59:59,272 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-11 20:59:59,272 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-11 20:59:59,279 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:59:59" (1/1) ... [2024-11-11 20:59:59,284 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:59:59" (1/1) ... [2024-11-11 20:59:59,296 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2024-11-11 20:59:59,296 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-11 20:59:59,297 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-11 20:59:59,297 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-11 20:59:59,298 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-11 20:59:59,305 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:59:59" (1/1) ... [2024-11-11 20:59:59,306 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:59:59" (1/1) ... [2024-11-11 20:59:59,307 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:59:59" (1/1) ... [2024-11-11 20:59:59,315 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]. [2024-11-11 20:59:59,315 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:59:59" (1/1) ... [2024-11-11 20:59:59,315 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:59:59" (1/1) ... [2024-11-11 20:59:59,317 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:59:59" (1/1) ... [2024-11-11 20:59:59,318 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:59:59" (1/1) ... [2024-11-11 20:59:59,319 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:59:59" (1/1) ... [2024-11-11 20:59:59,320 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:59:59" (1/1) ... [2024-11-11 20:59:59,325 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-11 20:59:59,326 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-11 20:59:59,328 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-11 20:59:59,329 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-11 20:59:59,330 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:59:59" (1/1) ... [2024-11-11 20:59:59,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 20:59:59,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:59:59,366 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) [2024-11-11 20:59:59,371 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 [2024-11-11 20:59:59,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-11 20:59:59,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-11 20:59:59,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-11 20:59:59,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-11 20:59:59,421 INFO L130 BoogieDeclarations]: Found specification of procedure id [2024-11-11 20:59:59,422 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2024-11-11 20:59:59,486 INFO L238 CfgBuilder]: Building ICFG [2024-11-11 20:59:59,488 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-11 20:59:59,606 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-11-11 20:59:59,608 INFO L287 CfgBuilder]: Performing block encoding [2024-11-11 20:59:59,637 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-11 20:59:59,637 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-11 20:59:59,637 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 08:59:59 BoogieIcfgContainer [2024-11-11 20:59:59,637 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-11 20:59:59,641 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-11 20:59:59,641 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-11 20:59:59,648 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-11 20:59:59,648 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 08:59:59" (1/3) ... [2024-11-11 20:59:59,649 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b62971 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 08:59:59, skipping insertion in model container [2024-11-11 20:59:59,649 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:59:59" (2/3) ... [2024-11-11 20:59:59,649 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b62971 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 08:59:59, skipping insertion in model container [2024-11-11 20:59:59,649 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 08:59:59" (3/3) ... [2024-11-11 20:59:59,650 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i20_o20-1.c [2024-11-11 20:59:59,669 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-11 20:59:59,669 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-11 20:59:59,748 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-11 20:59:59,755 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;@7521a99c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-11 20:59:59,755 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-11 20:59:59,759 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) [2024-11-11 20:59:59,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-11 20:59:59,764 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:59:59,765 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:59:59,765 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:59:59,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:59:59,770 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2024-11-11 20:59:59,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:59:59,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802127760] [2024-11-11 20:59:59,778 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:59:59,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:59:59,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:59:59,961 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 20:59:59,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:00,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 21:00:00,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:00:00,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802127760] [2024-11-11 21:00:00,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802127760] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 21:00:00,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 21:00:00,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-11 21:00:00,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832274006] [2024-11-11 21:00:00,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 21:00:00,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-11 21:00:00,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:00:00,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-11 21:00:00,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-11 21:00:00,048 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-11 21:00:00,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:00:00,093 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2024-11-11 21:00:00,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-11 21:00:00,095 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 [2024-11-11 21:00:00,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:00:00,103 INFO L225 Difference]: With dead ends: 25 [2024-11-11 21:00:00,103 INFO L226 Difference]: Without dead ends: 15 [2024-11-11 21:00:00,106 INFO L434 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 [2024-11-11 21:00:00,109 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 21:00:00,110 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 40 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 21:00:00,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-11 21:00:00,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-11-11 21:00:00,140 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) [2024-11-11 21:00:00,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2024-11-11 21:00:00,142 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2024-11-11 21:00:00,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:00:00,143 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2024-11-11 21:00:00,143 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) [2024-11-11 21:00:00,143 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2024-11-11 21:00:00,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-11 21:00:00,145 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:00:00,145 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:00:00,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-11 21:00:00,145 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:00:00,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:00:00,146 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2024-11-11 21:00:00,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:00:00,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787628275] [2024-11-11 21:00:00,147 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:00:00,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:00:00,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:00,243 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:00,343 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:00,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-11 21:00:00,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:00:00,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787628275] [2024-11-11 21:00:00,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787628275] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:00:00,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323402068] [2024-11-11 21:00:00,427 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:00:00,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:00:00,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:00:00,431 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) [2024-11-11 21:00:00,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-11 21:00:00,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:00,490 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-11 21:00:00,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:00:00,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-11 21:00:00,599 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:00:00,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-11 21:00:00,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323402068] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 21:00:00,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 21:00:00,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2024-11-11 21:00:00,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098937445] [2024-11-11 21:00:00,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 21:00:00,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-11 21:00:00,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:00:00,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-11 21:00:00,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-11 21:00:00,867 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 12 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-11 21:00:00,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:00:00,921 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2024-11-11 21:00:00,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-11 21:00:00,922 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 16 [2024-11-11 21:00:00,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:00:00,923 INFO L225 Difference]: With dead ends: 22 [2024-11-11 21:00:00,923 INFO L226 Difference]: Without dead ends: 18 [2024-11-11 21:00:00,923 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-11-11 21:00:00,925 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 21:00:00,925 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 44 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 21:00:00,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-11 21:00:00,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-11 21:00:00,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-11 21:00:00,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2024-11-11 21:00:00,931 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2024-11-11 21:00:00,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:00:00,931 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2024-11-11 21:00:00,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-11 21:00:00,932 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2024-11-11 21:00:00,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-11 21:00:00,933 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:00:00,933 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:00:00,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-11 21:00:01,133 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 [2024-11-11 21:00:01,134 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:00:01,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:00:01,135 INFO L85 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2024-11-11 21:00:01,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:00:01,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519287813] [2024-11-11 21:00:01,136 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:00:01,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:00:01,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:01,229 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:01,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:01,317 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:01,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:01,353 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:01,403 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-11 21:00:01,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:00:01,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519287813] [2024-11-11 21:00:01,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519287813] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:00:01,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764907603] [2024-11-11 21:00:01,404 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 21:00:01,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:00:01,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:00:01,407 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) [2024-11-11 21:00:01,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-11 21:00:01,463 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 21:00:01,463 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 21:00:01,464 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-11 21:00:01,465 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:00:01,528 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-11 21:00:01,528 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:00:01,939 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-11 21:00:01,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764907603] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 21:00:01,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 21:00:01,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 14 [2024-11-11 21:00:01,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627131774] [2024-11-11 21:00:01,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 21:00:01,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-11 21:00:01,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:00:01,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-11 21:00:01,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-11 21:00:01,944 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-11 21:00:01,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:00:02,000 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2024-11-11 21:00:02,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-11 21:00:02,001 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 22 [2024-11-11 21:00:02,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:00:02,002 INFO L225 Difference]: With dead ends: 25 [2024-11-11 21:00:02,002 INFO L226 Difference]: Without dead ends: 21 [2024-11-11 21:00:02,003 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2024-11-11 21:00:02,004 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 21:00:02,006 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 45 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 21:00:02,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-11 21:00:02,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-11 21:00:02,013 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) [2024-11-11 21:00:02,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2024-11-11 21:00:02,015 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2024-11-11 21:00:02,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:00:02,015 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2024-11-11 21:00:02,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-11 21:00:02,016 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2024-11-11 21:00:02,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-11 21:00:02,017 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:00:02,018 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:00:02,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-11 21:00:02,218 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 [2024-11-11 21:00:02,219 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:00:02,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:00:02,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2024-11-11 21:00:02,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:00:02,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295869246] [2024-11-11 21:00:02,220 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:00:02,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:00:02,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:02,285 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:02,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:02,338 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:02,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:02,392 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:02,441 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:02,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:02,486 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-11 21:00:02,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:00:02,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295869246] [2024-11-11 21:00:02,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295869246] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:00:02,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255987904] [2024-11-11 21:00:02,487 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-11 21:00:02,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:00:02,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:00:02,489 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) [2024-11-11 21:00:02,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-11 21:00:02,534 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-11 21:00:02,535 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 21:00:02,536 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-11 21:00:02,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:00:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-11 21:00:02,596 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:00:03,144 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-11 21:00:03,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255987904] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 21:00:03,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 21:00:03,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 16 [2024-11-11 21:00:03,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602667446] [2024-11-11 21:00:03,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 21:00:03,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-11 21:00:03,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:00:03,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-11 21:00:03,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2024-11-11 21:00:03,147 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-11 21:00:03,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:00:03,218 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2024-11-11 21:00:03,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-11 21:00:03,218 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) Word has length 28 [2024-11-11 21:00:03,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:00:03,219 INFO L225 Difference]: With dead ends: 28 [2024-11-11 21:00:03,219 INFO L226 Difference]: Without dead ends: 24 [2024-11-11 21:00:03,220 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2024-11-11 21:00:03,221 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 21:00:03,221 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 77 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 21:00:03,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-11 21:00:03,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-11 21:00:03,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-11 21:00:03,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-11-11 21:00:03,228 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2024-11-11 21:00:03,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:00:03,228 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-11-11 21:00:03,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-11 21:00:03,229 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-11-11 21:00:03,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-11 21:00:03,230 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:00:03,230 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:00:03,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-11 21:00:03,434 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 [2024-11-11 21:00:03,435 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:00:03,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:00:03,435 INFO L85 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2024-11-11 21:00:03,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:00:03,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24400801] [2024-11-11 21:00:03,436 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:00:03,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:00:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:03,497 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:03,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:03,576 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:03,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:03,616 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:03,649 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:03,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:03,674 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:03,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:03,702 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-11 21:00:03,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:00:03,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24400801] [2024-11-11 21:00:03,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24400801] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:00:03,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154860211] [2024-11-11 21:00:03,703 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-11 21:00:03,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:00:03,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:00:03,705 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) [2024-11-11 21:00:03,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-11 21:00:03,751 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-11 21:00:03,752 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 21:00:03,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-11 21:00:03,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:00:03,806 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-11 21:00:03,807 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:00:04,549 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-11 21:00:04,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154860211] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 21:00:04,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 21:00:04,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 13] total 18 [2024-11-11 21:00:04,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008134140] [2024-11-11 21:00:04,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 21:00:04,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-11 21:00:04,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:00:04,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-11 21:00:04,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2024-11-11 21:00:04,552 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 18 states, 16 states have (on average 2.0625) internal successors, (33), 18 states have internal predecessors, (33), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2024-11-11 21:00:04,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:00:04,618 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2024-11-11 21:00:04,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-11 21:00:04,619 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 18 states have internal predecessors, (33), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) Word has length 34 [2024-11-11 21:00:04,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:00:04,620 INFO L225 Difference]: With dead ends: 31 [2024-11-11 21:00:04,620 INFO L226 Difference]: Without dead ends: 27 [2024-11-11 21:00:04,621 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2024-11-11 21:00:04,622 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 21:00:04,622 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 69 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 21:00:04,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-11 21:00:04,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-11 21:00:04,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-11 21:00:04,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2024-11-11 21:00:04,631 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2024-11-11 21:00:04,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:00:04,631 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2024-11-11 21:00:04,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 18 states have internal predecessors, (33), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2024-11-11 21:00:04,631 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2024-11-11 21:00:04,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-11 21:00:04,632 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:00:04,632 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:00:04,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-11 21:00:04,834 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 [2024-11-11 21:00:04,835 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:00:04,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:00:04,836 INFO L85 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2024-11-11 21:00:04,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:00:04,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327066197] [2024-11-11 21:00:04,836 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:00:04,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:00:04,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:04,897 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:04,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:04,960 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:04,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:05,004 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:05,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:05,036 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:05,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:05,062 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:05,081 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:05,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:05,129 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-11 21:00:05,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:00:05,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327066197] [2024-11-11 21:00:05,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327066197] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:00:05,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041809195] [2024-11-11 21:00:05,130 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-11 21:00:05,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:00:05,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:00:05,132 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) [2024-11-11 21:00:05,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-11 21:00:05,191 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-11 21:00:05,191 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 21:00:05,192 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-11 21:00:05,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:00:05,250 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-11 21:00:05,250 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:00:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-11 21:00:06,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041809195] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 21:00:06,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 21:00:06,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 15] total 20 [2024-11-11 21:00:06,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671916779] [2024-11-11 21:00:06,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 21:00:06,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-11 21:00:06,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:00:06,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-11 21:00:06,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2024-11-11 21:00:06,334 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 20 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2024-11-11 21:00:06,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:00:06,412 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2024-11-11 21:00:06,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-11 21:00:06,413 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 40 [2024-11-11 21:00:06,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:00:06,415 INFO L225 Difference]: With dead ends: 34 [2024-11-11 21:00:06,415 INFO L226 Difference]: Without dead ends: 30 [2024-11-11 21:00:06,416 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 75 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2024-11-11 21:00:06,416 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 21:00:06,417 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 74 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 21:00:06,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-11 21:00:06,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-11 21:00:06,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-11 21:00:06,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2024-11-11 21:00:06,422 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2024-11-11 21:00:06,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:00:06,424 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2024-11-11 21:00:06,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2024-11-11 21:00:06,424 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2024-11-11 21:00:06,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-11 21:00:06,425 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:00:06,425 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:00:06,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-11 21:00:06,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:00:06,626 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:00:06,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:00:06,627 INFO L85 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2024-11-11 21:00:06,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:00:06,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960908241] [2024-11-11 21:00:06,627 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:00:06,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:00:06,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:06,698 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:06,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:06,772 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:06,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:06,816 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:06,853 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:06,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:06,907 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:06,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:06,932 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:06,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:06,953 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:06,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:06,993 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-11 21:00:06,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:00:06,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960908241] [2024-11-11 21:00:06,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960908241] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:00:06,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062759048] [2024-11-11 21:00:06,994 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-11 21:00:06,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:00:06,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:00:06,996 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) [2024-11-11 21:00:06,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-11 21:00:07,066 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-11 21:00:07,066 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 21:00:07,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-11 21:00:07,069 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:00:07,138 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-11 21:00:07,138 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:00:08,528 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-11 21:00:08,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062759048] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 21:00:08,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 21:00:08,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 17] total 22 [2024-11-11 21:00:08,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965906220] [2024-11-11 21:00:08,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 21:00:08,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-11 21:00:08,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:00:08,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-11 21:00:08,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2024-11-11 21:00:08,531 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 22 states, 20 states have (on average 2.05) internal successors, (41), 22 states have internal predecessors, (41), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2024-11-11 21:00:08,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:00:08,600 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2024-11-11 21:00:08,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-11 21:00:08,600 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.05) internal successors, (41), 22 states have internal predecessors, (41), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) Word has length 46 [2024-11-11 21:00:08,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:00:08,601 INFO L225 Difference]: With dead ends: 37 [2024-11-11 21:00:08,601 INFO L226 Difference]: Without dead ends: 33 [2024-11-11 21:00:08,602 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 87 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2024-11-11 21:00:08,602 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 21:00:08,602 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 84 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 21:00:08,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-11 21:00:08,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-11 21:00:08,607 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) [2024-11-11 21:00:08,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-11-11 21:00:08,607 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2024-11-11 21:00:08,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:00:08,608 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-11-11 21:00:08,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.05) internal successors, (41), 22 states have internal predecessors, (41), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2024-11-11 21:00:08,608 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-11-11 21:00:08,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-11 21:00:08,609 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:00:08,609 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:00:08,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-11 21:00:08,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:00:08,812 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:00:08,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:00:08,813 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2024-11-11 21:00:08,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:00:08,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921632268] [2024-11-11 21:00:08,813 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:00:08,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:00:08,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:08,877 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:08,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:08,953 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:08,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:09,015 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:09,064 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:09,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:09,107 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:09,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:09,136 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:09,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:09,163 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:09,184 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:09,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:09,212 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-11 21:00:09,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:00:09,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921632268] [2024-11-11 21:00:09,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921632268] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:00:09,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544648739] [2024-11-11 21:00:09,213 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-11 21:00:09,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:00:09,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:00:09,215 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) [2024-11-11 21:00:09,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-11 21:00:09,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:09,304 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-11 21:00:09,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:00:09,385 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-11-11 21:00:09,386 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:00:11,251 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-11 21:00:11,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544648739] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 21:00:11,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 21:00:11,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 19] total 24 [2024-11-11 21:00:11,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466399880] [2024-11-11 21:00:11,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 21:00:11,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-11 21:00:11,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:00:11,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-11 21:00:11,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2024-11-11 21:00:11,255 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 24 states have internal predecessors, (45), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2024-11-11 21:00:11,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:00:11,342 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2024-11-11 21:00:11,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-11 21:00:11,343 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 24 states have internal predecessors, (45), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) Word has length 52 [2024-11-11 21:00:11,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:00:11,344 INFO L225 Difference]: With dead ends: 40 [2024-11-11 21:00:11,344 INFO L226 Difference]: Without dead ends: 36 [2024-11-11 21:00:11,345 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 99 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2024-11-11 21:00:11,345 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 21:00:11,345 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 90 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 21:00:11,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-11 21:00:11,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-11 21:00:11,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-11 21:00:11,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2024-11-11 21:00:11,357 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2024-11-11 21:00:11,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:00:11,357 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2024-11-11 21:00:11,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 24 states have internal predecessors, (45), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2024-11-11 21:00:11,358 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2024-11-11 21:00:11,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-11 21:00:11,358 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:00:11,359 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:00:11,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-11 21:00:11,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:00:11,559 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:00:11,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:00:11,560 INFO L85 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2024-11-11 21:00:11,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:00:11,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017360570] [2024-11-11 21:00:11,560 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:00:11,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:00:11,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:11,620 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:11,698 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:11,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:11,757 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:11,805 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:11,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:11,848 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:11,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:11,889 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:11,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:11,916 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:11,948 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:11,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:11,967 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:11,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:11,997 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-11 21:00:11,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:00:11,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017360570] [2024-11-11 21:00:11,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017360570] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:00:11,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053630109] [2024-11-11 21:00:11,998 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 21:00:11,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:00:11,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:00:12,000 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) [2024-11-11 21:00:12,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-11 21:00:12,113 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 21:00:12,113 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 21:00:12,114 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-11 21:00:12,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:00:12,199 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-11 21:00:12,199 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:00:14,762 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-11 21:00:14,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053630109] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 21:00:14,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 21:00:14,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 21] total 26 [2024-11-11 21:00:14,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109527749] [2024-11-11 21:00:14,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 21:00:14,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-11 21:00:14,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:00:14,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-11 21:00:14,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2024-11-11 21:00:14,766 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 26 states have internal predecessors, (49), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2024-11-11 21:00:14,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:00:14,896 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2024-11-11 21:00:14,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-11 21:00:14,896 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 26 states have internal predecessors, (49), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) Word has length 58 [2024-11-11 21:00:14,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:00:14,897 INFO L225 Difference]: With dead ends: 43 [2024-11-11 21:00:14,897 INFO L226 Difference]: Without dead ends: 39 [2024-11-11 21:00:14,898 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 111 SyntacticMatches, 9 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=355, Invalid=767, Unknown=0, NotChecked=0, Total=1122 [2024-11-11 21:00:14,899 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 97 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 21:00:14,899 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 87 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 21:00:14,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-11 21:00:14,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-11 21:00:14,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2024-11-11 21:00:14,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2024-11-11 21:00:14,910 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2024-11-11 21:00:14,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:00:14,910 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2024-11-11 21:00:14,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 26 states have internal predecessors, (49), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2024-11-11 21:00:14,911 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2024-11-11 21:00:14,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-11 21:00:14,914 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:00:14,915 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:00:14,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-11 21:00:15,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-11 21:00:15,120 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:00:15,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:00:15,121 INFO L85 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2024-11-11 21:00:15,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:00:15,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618497016] [2024-11-11 21:00:15,121 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:00:15,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:00:15,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:15,201 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:15,318 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:15,395 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:15,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:15,453 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:15,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:15,504 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:15,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:15,549 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:15,590 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:15,634 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:15,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:15,659 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:15,680 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:15,711 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-11-11 21:00:15,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:00:15,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618497016] [2024-11-11 21:00:15,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618497016] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:00:15,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709137066] [2024-11-11 21:00:15,712 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-11 21:00:15,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:00:15,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:00:15,714 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) [2024-11-11 21:00:15,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-11 21:00:15,891 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-11 21:00:15,892 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 21:00:15,893 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-11 21:00:15,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:00:15,975 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-11-11 21:00:15,976 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:00:19,222 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-11 21:00:19,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709137066] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 21:00:19,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 21:00:19,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 23] total 28 [2024-11-11 21:00:19,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498165239] [2024-11-11 21:00:19,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 21:00:19,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-11 21:00:19,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:00:19,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-11 21:00:19,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2024-11-11 21:00:19,224 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 28 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 28 states have internal predecessors, (53), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2024-11-11 21:00:19,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:00:19,316 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2024-11-11 21:00:19,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-11 21:00:19,319 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 28 states have internal predecessors, (53), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) Word has length 64 [2024-11-11 21:00:19,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:00:19,320 INFO L225 Difference]: With dead ends: 46 [2024-11-11 21:00:19,320 INFO L226 Difference]: Without dead ends: 42 [2024-11-11 21:00:19,320 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 123 SyntacticMatches, 10 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=909, Unknown=0, NotChecked=0, Total=1332 [2024-11-11 21:00:19,321 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 21:00:19,321 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 96 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 21:00:19,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-11 21:00:19,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-11-11 21:00:19,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-11 21:00:19,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2024-11-11 21:00:19,326 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2024-11-11 21:00:19,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:00:19,327 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2024-11-11 21:00:19,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 28 states have internal predecessors, (53), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2024-11-11 21:00:19,327 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2024-11-11 21:00:19,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-11 21:00:19,328 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:00:19,328 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:00:19,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-11 21:00:19,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-11 21:00:19,529 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:00:19,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:00:19,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2024-11-11 21:00:19,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:00:19,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034275715] [2024-11-11 21:00:19,530 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:00:19,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:00:19,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:19,614 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:19,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:19,704 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:19,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:19,793 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:19,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:19,861 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:19,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:19,917 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:19,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:19,967 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:20,008 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:20,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:20,043 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:20,073 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:20,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:20,101 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:20,126 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:20,158 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-11 21:00:20,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:00:20,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034275715] [2024-11-11 21:00:20,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034275715] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:00:20,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412461200] [2024-11-11 21:00:20,159 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-11 21:00:20,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:00:20,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:00:20,161 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) [2024-11-11 21:00:20,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-11 21:00:20,369 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-11 21:00:20,369 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 21:00:20,371 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-11 21:00:20,372 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:00:20,464 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-11-11 21:00:20,464 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:00:25,069 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-11 21:00:25,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412461200] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 21:00:25,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 21:00:25,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 25] total 30 [2024-11-11 21:00:25,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376731141] [2024-11-11 21:00:25,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 21:00:25,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-11 21:00:25,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:00:25,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-11 21:00:25,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=633, Unknown=0, NotChecked=0, Total=870 [2024-11-11 21:00:25,072 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 30 states have internal predecessors, (57), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2024-11-11 21:00:25,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:00:25,199 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2024-11-11 21:00:25,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-11 21:00:25,200 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 30 states have internal predecessors, (57), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) Word has length 70 [2024-11-11 21:00:25,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:00:25,201 INFO L225 Difference]: With dead ends: 49 [2024-11-11 21:00:25,201 INFO L226 Difference]: Without dead ends: 45 [2024-11-11 21:00:25,202 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 135 SyntacticMatches, 11 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=497, Invalid=1063, Unknown=0, NotChecked=0, Total=1560 [2024-11-11 21:00:25,202 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 21:00:25,202 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 119 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 21:00:25,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-11 21:00:25,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-11-11 21:00:25,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2024-11-11 21:00:25,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2024-11-11 21:00:25,208 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2024-11-11 21:00:25,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:00:25,208 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2024-11-11 21:00:25,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 30 states have internal predecessors, (57), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2024-11-11 21:00:25,209 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2024-11-11 21:00:25,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-11 21:00:25,210 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:00:25,210 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:00:25,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-11 21:00:25,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-11 21:00:25,410 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:00:25,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:00:25,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2024-11-11 21:00:25,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:00:25,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677452035] [2024-11-11 21:00:25,411 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:00:25,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:00:25,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:25,500 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:25,594 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:25,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:25,664 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:25,725 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:25,778 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:25,826 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:25,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:25,867 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:25,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:25,903 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:25,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:25,948 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:25,975 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:26,000 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:26,022 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:26,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:26,054 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-11-11 21:00:26,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:00:26,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677452035] [2024-11-11 21:00:26,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677452035] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:00:26,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616342435] [2024-11-11 21:00:26,054 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-11 21:00:26,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:00:26,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:00:26,056 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 21:00:26,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-11 21:00:26,310 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-11-11 21:00:26,310 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 21:00:26,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-11 21:00:26,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:00:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-11-11 21:00:26,390 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:00:32,038 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-11 21:00:32,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616342435] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 21:00:32,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 21:00:32,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 27] total 32 [2024-11-11 21:00:32,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489061254] [2024-11-11 21:00:32,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 21:00:32,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-11 21:00:32,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:00:32,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-11 21:00:32,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2024-11-11 21:00:32,041 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 32 states, 30 states have (on average 2.033333333333333) internal successors, (61), 32 states have internal predecessors, (61), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2024-11-11 21:00:32,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:00:32,214 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2024-11-11 21:00:32,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-11 21:00:32,214 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.033333333333333) internal successors, (61), 32 states have internal predecessors, (61), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) Word has length 76 [2024-11-11 21:00:32,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:00:32,218 INFO L225 Difference]: With dead ends: 52 [2024-11-11 21:00:32,218 INFO L226 Difference]: Without dead ends: 48 [2024-11-11 21:00:32,218 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 147 SyntacticMatches, 12 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=577, Invalid=1229, Unknown=0, NotChecked=0, Total=1806 [2024-11-11 21:00:32,219 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 71 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 21:00:32,219 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 120 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 21:00:32,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-11 21:00:32,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-11-11 21:00:32,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-11 21:00:32,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2024-11-11 21:00:32,224 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2024-11-11 21:00:32,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:00:32,225 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2024-11-11 21:00:32,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.033333333333333) internal successors, (61), 32 states have internal predecessors, (61), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2024-11-11 21:00:32,225 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2024-11-11 21:00:32,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-11 21:00:32,226 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:00:32,226 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:00:32,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-11 21:00:32,430 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-11 21:00:32,430 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:00:32,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:00:32,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2024-11-11 21:00:32,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:00:32,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838666644] [2024-11-11 21:00:32,431 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:00:32,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:00:32,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:32,544 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:32,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:32,650 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:32,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:32,738 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:32,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:32,825 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:32,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:32,917 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:32,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:32,970 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:33,030 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:33,073 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:33,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:33,110 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:33,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:33,147 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:33,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:33,179 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:33,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:33,209 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:33,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:33,232 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-11 21:00:33,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:00:33,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838666644] [2024-11-11 21:00:33,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838666644] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:00:33,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975581545] [2024-11-11 21:00:33,269 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-11 21:00:33,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:00:33,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:00:33,271 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 21:00:33,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-11 21:00:33,592 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-11-11 21:00:33,592 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 21:00:33,593 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-11 21:00:33,595 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:00:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-11-11 21:00:33,693 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:00:40,998 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-11 21:00:40,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975581545] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 21:00:40,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 21:00:40,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 29] total 34 [2024-11-11 21:00:40,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227251039] [2024-11-11 21:00:40,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 21:00:41,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-11 21:00:41,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:00:41,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-11 21:00:41,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2024-11-11 21:00:41,001 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 34 states, 32 states have (on average 2.03125) internal successors, (65), 34 states have internal predecessors, (65), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2024-11-11 21:00:41,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:00:41,168 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2024-11-11 21:00:41,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-11 21:00:41,168 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.03125) internal successors, (65), 34 states have internal predecessors, (65), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) Word has length 82 [2024-11-11 21:00:41,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:00:41,169 INFO L225 Difference]: With dead ends: 55 [2024-11-11 21:00:41,169 INFO L226 Difference]: Without dead ends: 51 [2024-11-11 21:00:41,170 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 159 SyntacticMatches, 13 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=663, Invalid=1407, Unknown=0, NotChecked=0, Total=2070 [2024-11-11 21:00:41,171 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 21:00:41,171 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 116 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 21:00:41,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-11 21:00:41,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-11 21:00:41,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-11 21:00:41,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2024-11-11 21:00:41,193 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2024-11-11 21:00:41,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:00:41,194 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2024-11-11 21:00:41,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.03125) internal successors, (65), 34 states have internal predecessors, (65), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2024-11-11 21:00:41,194 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2024-11-11 21:00:41,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-11 21:00:41,195 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:00:41,195 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:00:41,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-11 21:00:41,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-11 21:00:41,400 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:00:41,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:00:41,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2024-11-11 21:00:41,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:00:41,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867951158] [2024-11-11 21:00:41,400 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:00:41,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:00:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:41,546 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:41,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:41,652 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:41,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:41,740 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:41,818 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:41,889 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:41,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:41,967 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:41,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:42,018 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:42,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:42,062 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:42,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:42,100 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:42,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:42,135 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:42,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:42,166 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:42,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:42,197 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:42,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:42,223 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:42,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:42,245 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:42,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:42,279 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-11-11 21:00:42,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:00:42,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867951158] [2024-11-11 21:00:42,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867951158] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:00:42,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603392106] [2024-11-11 21:00:42,279 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-11 21:00:42,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:00:42,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:00:42,282 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 21:00:42,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-11 21:00:42,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:42,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-11 21:00:42,742 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:00:42,848 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-11-11 21:00:42,848 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:00:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-11 21:00:52,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603392106] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 21:00:52,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 21:00:52,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 31] total 36 [2024-11-11 21:00:52,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138852492] [2024-11-11 21:00:52,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 21:00:52,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-11 21:00:52,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:00:52,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-11 21:00:52,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=921, Unknown=0, NotChecked=0, Total=1260 [2024-11-11 21:00:52,168 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 36 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 36 states have internal predecessors, (69), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2024-11-11 21:00:52,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:00:52,360 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2024-11-11 21:00:52,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-11 21:00:52,361 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 36 states have internal predecessors, (69), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) Word has length 88 [2024-11-11 21:00:52,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:00:52,362 INFO L225 Difference]: With dead ends: 58 [2024-11-11 21:00:52,362 INFO L226 Difference]: Without dead ends: 54 [2024-11-11 21:00:52,363 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 171 SyntacticMatches, 14 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=755, Invalid=1597, Unknown=0, NotChecked=0, Total=2352 [2024-11-11 21:00:52,363 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 123 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 21:00:52,364 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 144 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 21:00:52,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-11 21:00:52,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-11 21:00:52,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (16), 15 states have call predecessors, (16), 2 states have call successors, (16) [2024-11-11 21:00:52,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2024-11-11 21:00:52,372 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2024-11-11 21:00:52,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:00:52,373 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2024-11-11 21:00:52,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 36 states have internal predecessors, (69), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2024-11-11 21:00:52,374 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2024-11-11 21:00:52,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-11 21:00:52,375 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:00:52,375 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:00:52,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-11 21:00:52,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-11 21:00:52,577 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:00:52,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:00:52,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2024-11-11 21:00:52,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:00:52,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009801490] [2024-11-11 21:00:52,577 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:00:52,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:00:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:52,720 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:52,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:52,829 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:52,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:52,926 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:52,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:53,013 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:53,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:53,109 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:53,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:53,184 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:53,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:53,242 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:53,295 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:53,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:53,348 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:53,388 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:53,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:53,422 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:53,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:53,451 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:53,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:53,477 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:53,501 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:53,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:53,523 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:00:53,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:00:53,557 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-11-11 21:00:53,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:00:53,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009801490] [2024-11-11 21:00:53,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009801490] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:00:53,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380311256] [2024-11-11 21:00:53,558 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 21:00:53,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:00:53,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:00:53,560 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 21:00:53,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-11 21:00:54,151 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 21:00:54,151 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 21:00:54,152 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-11 21:00:54,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:00:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2024-11-11 21:00:54,251 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:01:05,695 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-11 21:01:05,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380311256] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 21:01:05,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 21:01:05,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 33] total 38 [2024-11-11 21:01:05,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772506943] [2024-11-11 21:01:05,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 21:01:05,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-11 21:01:05,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:01:05,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-11 21:01:05,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=1029, Unknown=0, NotChecked=0, Total=1406 [2024-11-11 21:01:05,698 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 38 states have internal predecessors, (73), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) [2024-11-11 21:01:05,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:01:05,894 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2024-11-11 21:01:05,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-11 21:01:05,895 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 38 states have internal predecessors, (73), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) Word has length 94 [2024-11-11 21:01:05,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:01:05,896 INFO L225 Difference]: With dead ends: 61 [2024-11-11 21:01:05,896 INFO L226 Difference]: Without dead ends: 57 [2024-11-11 21:01:05,897 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 183 SyntacticMatches, 15 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=853, Invalid=1799, Unknown=0, NotChecked=0, Total=2652 [2024-11-11 21:01:05,897 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 244 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 21:01:05,898 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 130 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 21:01:05,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-11 21:01:05,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-11-11 21:01:05,902 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) [2024-11-11 21:01:05,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2024-11-11 21:01:05,903 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2024-11-11 21:01:05,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:01:05,903 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2024-11-11 21:01:05,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 38 states have internal predecessors, (73), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) [2024-11-11 21:01:05,903 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2024-11-11 21:01:05,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-11 21:01:05,904 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:01:05,904 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:01:05,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-11 21:01:06,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:01:06,105 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:01:06,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:01:06,106 INFO L85 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2024-11-11 21:01:06,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:01:06,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392601267] [2024-11-11 21:01:06,106 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:01:06,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:01:06,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:01:06,228 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:01:06,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:01:06,364 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:01:06,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:01:06,468 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:01:06,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:01:06,560 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:01:06,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:01:06,640 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:01:06,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:01:06,710 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:01:06,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:01:06,771 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:01:06,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:01:06,848 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:01:06,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:01:06,908 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:01:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:01:06,953 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:01:06,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:01:06,999 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:01:07,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:01:07,035 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:01:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:01:07,068 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:01:07,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:01:07,097 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:01:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:01:07,122 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:01:07,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:01:07,144 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:01:07,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:01:07,179 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-11-11 21:01:07,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:01:07,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392601267] [2024-11-11 21:01:07,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392601267] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:01:07,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222046234] [2024-11-11 21:01:07,180 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-11 21:01:07,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:01:07,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:01:07,182 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 21:01:07,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-11 21:01:07,865 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-11 21:01:07,865 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 21:01:07,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-11 21:01:07,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:01:07,982 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-11-11 21:01:07,983 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:01:22,252 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-11 21:01:22,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222046234] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 21:01:22,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 21:01:22,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 35] total 40 [2024-11-11 21:01:22,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286336606] [2024-11-11 21:01:22,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 21:01:22,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-11 21:01:22,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:01:22,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-11 21:01:22,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=1143, Unknown=0, NotChecked=0, Total=1560 [2024-11-11 21:01:22,255 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 40 states, 38 states have (on average 2.026315789473684) internal successors, (77), 40 states have internal predecessors, (77), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) [2024-11-11 21:01:22,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:01:22,466 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2024-11-11 21:01:22,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-11 21:01:22,466 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 2.026315789473684) internal successors, (77), 40 states have internal predecessors, (77), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) Word has length 100 [2024-11-11 21:01:22,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:01:22,467 INFO L225 Difference]: With dead ends: 64 [2024-11-11 21:01:22,467 INFO L226 Difference]: Without dead ends: 60 [2024-11-11 21:01:22,468 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 195 SyntacticMatches, 16 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=957, Invalid=2013, Unknown=0, NotChecked=0, Total=2970 [2024-11-11 21:01:22,469 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 82 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 21:01:22,469 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 146 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 21:01:22,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-11 21:01:22,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-11-11 21:01:22,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (18), 17 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-11 21:01:22,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2024-11-11 21:01:22,479 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2024-11-11 21:01:22,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:01:22,480 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2024-11-11 21:01:22,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 2.026315789473684) internal successors, (77), 40 states have internal predecessors, (77), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) [2024-11-11 21:01:22,480 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2024-11-11 21:01:22,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-11 21:01:22,481 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:01:22,481 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:01:22,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-11 21:01:22,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-11 21:01:22,682 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:01:22,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:01:22,682 INFO L85 PathProgramCache]: Analyzing trace with hash 317812044, now seen corresponding path program 16 times [2024-11-11 21:01:22,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:01:22,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92489107] [2024-11-11 21:01:22,682 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:01:22,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:01:22,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:01:22,808 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:01:22,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:01:22,965 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:01:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat