./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i10_o10-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.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_i10_o10-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3f8ee4f5181b3404c1367dbf131683f1e761cea6b176154f687b628466c991fe --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 05:45:38,130 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 05:45:38,181 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 05:45:38,186 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 05:45:38,186 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 05:45:38,199 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 05:45:38,200 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 05:45:38,200 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 05:45:38,200 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 05:45:38,200 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 05:45:38,200 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 05:45:38,200 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 05:45:38,201 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 05:45:38,201 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 05:45:38,201 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 05:45:38,201 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 05:45:38,201 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 05:45:38,201 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 05:45:38,201 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 05:45:38,201 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 05:45:38,201 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 05:45:38,201 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 05:45:38,202 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 05:45:38,202 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 05:45:38,202 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 05:45:38,202 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 05:45:38,202 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 05:45:38,202 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 05:45:38,202 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 05:45:38,202 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 05:45:38,202 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 05:45:38,202 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 05:45:38,202 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:45:38,202 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 05:45:38,202 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 05:45:38,202 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 05:45:38,202 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 05:45:38,203 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 05:45:38,203 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 05:45:38,203 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 05:45:38,203 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 05:45:38,203 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 05:45:38,203 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 05:45:38,203 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> 3f8ee4f5181b3404c1367dbf131683f1e761cea6b176154f687b628466c991fe [2025-03-08 05:45:38,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 05:45:38,422 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 05:45:38,424 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 05:45:38,425 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 05:45:38,425 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 05:45:38,426 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_i10_o10-2.c [2025-03-08 05:45:39,495 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0f5fa8df/d06a450f2178477d8d05843ee4ffe3ff/FLAG528419d4a [2025-03-08 05:45:39,690 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 05:45:39,690 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i10_o10-2.c [2025-03-08 05:45:39,695 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0f5fa8df/d06a450f2178477d8d05843ee4ffe3ff/FLAG528419d4a [2025-03-08 05:45:40,066 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0f5fa8df/d06a450f2178477d8d05843ee4ffe3ff [2025-03-08 05:45:40,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 05:45:40,068 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 05:45:40,069 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 05:45:40,069 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 05:45:40,072 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 05:45:40,073 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:45:40" (1/1) ... [2025-03-08 05:45:40,073 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59c1f68b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:45:40, skipping insertion in model container [2025-03-08 05:45:40,073 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:45:40" (1/1) ... [2025-03-08 05:45:40,081 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 05:45:40,176 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_i10_o10-2.c[454,467] [2025-03-08 05:45:40,179 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:45:40,186 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 05:45:40,193 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_i10_o10-2.c[454,467] [2025-03-08 05:45:40,194 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:45:40,203 INFO L204 MainTranslator]: Completed translation [2025-03-08 05:45:40,203 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:45:40 WrapperNode [2025-03-08 05:45:40,203 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 05:45:40,205 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 05:45:40,205 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 05:45:40,205 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 05:45:40,209 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:45:40" (1/1) ... [2025-03-08 05:45:40,213 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:45:40" (1/1) ... [2025-03-08 05:45:40,223 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2025-03-08 05:45:40,224 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 05:45:40,224 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 05:45:40,224 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 05:45:40,224 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 05:45:40,229 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:45:40" (1/1) ... [2025-03-08 05:45:40,229 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:45:40" (1/1) ... [2025-03-08 05:45:40,230 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:45:40" (1/1) ... [2025-03-08 05:45:40,237 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]. [2025-03-08 05:45:40,238 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:45:40" (1/1) ... [2025-03-08 05:45:40,238 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:45:40" (1/1) ... [2025-03-08 05:45:40,242 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:45:40" (1/1) ... [2025-03-08 05:45:40,243 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:45:40" (1/1) ... [2025-03-08 05:45:40,243 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:45:40" (1/1) ... [2025-03-08 05:45:40,244 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:45:40" (1/1) ... [2025-03-08 05:45:40,244 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 05:45:40,246 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 05:45:40,246 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 05:45:40,246 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 05:45:40,247 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:45:40" (1/1) ... [2025-03-08 05:45:40,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:45:40,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:40,274 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) [2025-03-08 05:45:40,282 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 [2025-03-08 05:45:40,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 05:45:40,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 05:45:40,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 05:45:40,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 05:45:40,299 INFO L130 BoogieDeclarations]: Found specification of procedure id [2025-03-08 05:45:40,299 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2025-03-08 05:45:40,332 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 05:45:40,333 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 05:45:40,401 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L8: havoc #t~ret4; [2025-03-08 05:45:40,405 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2025-03-08 05:45:40,405 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 05:45:40,410 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 05:45:40,410 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 05:45:40,410 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:45:40 BoogieIcfgContainer [2025-03-08 05:45:40,410 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 05:45:40,412 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 05:45:40,412 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 05:45:40,415 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 05:45:40,415 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:45:40" (1/3) ... [2025-03-08 05:45:40,416 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56c2c38c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:45:40, skipping insertion in model container [2025-03-08 05:45:40,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:45:40" (2/3) ... [2025-03-08 05:45:40,416 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56c2c38c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:45:40, skipping insertion in model container [2025-03-08 05:45:40,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:45:40" (3/3) ... [2025-03-08 05:45:40,417 INFO L128 eAbstractionObserver]: Analyzing ICFG id_i10_o10-2.c [2025-03-08 05:45:40,429 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 05:45:40,431 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG id_i10_o10-2.c that has 2 procedures, 16 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-08 05:45:40,469 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 05:45:40,479 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;@38725e9a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 05:45:40,479 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 05:45:40,482 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) [2025-03-08 05:45:40,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-08 05:45:40,487 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:40,487 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:40,487 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:40,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:40,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1536782931, now seen corresponding path program 1 times [2025-03-08 05:45:40,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:40,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540353634] [2025-03-08 05:45:40,496 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:45:40,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:40,537 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-08 05:45:40,549 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-08 05:45:40,550 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:45:40,550 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:40,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 05:45:40,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:40,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540353634] [2025-03-08 05:45:40,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540353634] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:45:40,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:45:40,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:45:40,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939309515] [2025-03-08 05:45:40,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:45:40,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:45:40,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:40,645 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:45:40,645 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:45:40,647 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) [2025-03-08 05:45:40,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:40,681 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2025-03-08 05:45:40,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:45:40,684 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 [2025-03-08 05:45:40,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:40,688 INFO L225 Difference]: With dead ends: 25 [2025-03-08 05:45:40,688 INFO L226 Difference]: Without dead ends: 15 [2025-03-08 05:45:40,690 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:45:40,691 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 [2025-03-08 05:45:40,692 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] [2025-03-08 05:45:40,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2025-03-08 05:45:40,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2025-03-08 05:45:40,711 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) [2025-03-08 05:45:40,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2025-03-08 05:45:40,716 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2025-03-08 05:45:40,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:40,716 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2025-03-08 05:45:40,716 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) [2025-03-08 05:45:40,716 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2025-03-08 05:45:40,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-08 05:45:40,717 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:40,717 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:40,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 05:45:40,717 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:40,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:40,717 INFO L85 PathProgramCache]: Analyzing trace with hash -808024836, now seen corresponding path program 1 times [2025-03-08 05:45:40,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:40,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228540363] [2025-03-08 05:45:40,718 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:45:40,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:40,723 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-08 05:45:40,728 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 05:45:40,728 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:45:40,728 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:40,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 05:45:40,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:40,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228540363] [2025-03-08 05:45:40,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228540363] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:40,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397545234] [2025-03-08 05:45:40,817 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:45:40,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:40,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:40,819 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) [2025-03-08 05:45:40,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 05:45:40,842 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-08 05:45:40,851 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 05:45:40,851 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:45:40,851 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:40,853 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 05:45:40,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:40,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 05:45:40,893 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:41,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:45:41,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397545234] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:41,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:41,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 9 [2025-03-08 05:45:41,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361603599] [2025-03-08 05:45:41,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:41,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 05:45:41,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:41,062 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 05:45:41,062 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-03-08 05:45:41,062 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 9 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-08 05:45:41,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:41,092 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2025-03-08 05:45:41,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 05:45:41,092 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 9 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 16 [2025-03-08 05:45:41,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:41,093 INFO L225 Difference]: With dead ends: 22 [2025-03-08 05:45:41,093 INFO L226 Difference]: Without dead ends: 18 [2025-03-08 05:45:41,093 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-03-08 05:45:41,094 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:41,094 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 32 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:45:41,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2025-03-08 05:45:41,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2025-03-08 05:45:41,096 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) [2025-03-08 05:45:41,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2025-03-08 05:45:41,097 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2025-03-08 05:45:41,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:41,097 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2025-03-08 05:45:41,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 9 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-08 05:45:41,097 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2025-03-08 05:45:41,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-03-08 05:45:41,097 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:41,098 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:41,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 05:45:41,298 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 [2025-03-08 05:45:41,298 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:41,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:41,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1152729037, now seen corresponding path program 2 times [2025-03-08 05:45:41,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:41,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228364212] [2025-03-08 05:45:41,299 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:45:41,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:41,303 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-08 05:45:41,311 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-08 05:45:41,311 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:45:41,311 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:41,428 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-08 05:45:41,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:41,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228364212] [2025-03-08 05:45:41,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228364212] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:41,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854414090] [2025-03-08 05:45:41,429 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:45:41,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:41,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:41,432 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) [2025-03-08 05:45:41,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 05:45:41,455 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-08 05:45:41,469 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-08 05:45:41,469 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:45:41,469 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:41,470 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 05:45:41,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-08 05:45:41,522 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:41,775 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 05:45:41,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854414090] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:41,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:41,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 13 [2025-03-08 05:45:41,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385817227] [2025-03-08 05:45:41,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:41,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 05:45:41,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:41,778 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 05:45:41,779 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2025-03-08 05:45:41,779 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-08 05:45:41,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:41,845 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2025-03-08 05:45:41,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 05:45:41,846 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 22 [2025-03-08 05:45:41,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:41,846 INFO L225 Difference]: With dead ends: 25 [2025-03-08 05:45:41,847 INFO L226 Difference]: Without dead ends: 21 [2025-03-08 05:45:41,847 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2025-03-08 05:45:41,847 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:41,847 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 47 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:45:41,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-03-08 05:45:41,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2025-03-08 05:45:41,851 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) [2025-03-08 05:45:41,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2025-03-08 05:45:41,853 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2025-03-08 05:45:41,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:41,853 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2025-03-08 05:45:41,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-08 05:45:41,853 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2025-03-08 05:45:41,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-08 05:45:41,854 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:41,854 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:41,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 05:45:42,055 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 [2025-03-08 05:45:42,055 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:42,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:42,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1224835100, now seen corresponding path program 3 times [2025-03-08 05:45:42,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:42,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216742814] [2025-03-08 05:45:42,056 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:45:42,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:42,060 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 4 equivalence classes. [2025-03-08 05:45:42,065 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 05:45:42,065 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-08 05:45:42,065 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:42,182 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-08 05:45:42,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:42,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216742814] [2025-03-08 05:45:42,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216742814] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:42,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763181683] [2025-03-08 05:45:42,183 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:45:42,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:42,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:42,187 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) [2025-03-08 05:45:42,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 05:45:42,212 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 4 equivalence classes. [2025-03-08 05:45:42,221 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 05:45:42,221 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-08 05:45:42,221 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:42,221 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 05:45:42,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-08 05:45:42,269 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:42,667 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 05:45:42,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763181683] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:42,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:42,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 11] total 17 [2025-03-08 05:45:42,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749190975] [2025-03-08 05:45:42,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:42,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 05:45:42,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:42,670 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 05:45:42,671 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2025-03-08 05:45:42,671 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 17 states have internal predecessors, (31), 7 states have call successors, (7), 1 states have call predecessors, (7), 6 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2025-03-08 05:45:42,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:42,746 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2025-03-08 05:45:42,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 05:45:42,747 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 17 states have internal predecessors, (31), 7 states have call successors, (7), 1 states have call predecessors, (7), 6 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) Word has length 28 [2025-03-08 05:45:42,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:42,748 INFO L225 Difference]: With dead ends: 28 [2025-03-08 05:45:42,748 INFO L226 Difference]: Without dead ends: 24 [2025-03-08 05:45:42,748 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2025-03-08 05:45:42,748 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:42,749 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 68 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:45:42,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-03-08 05:45:42,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2025-03-08 05:45:42,751 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) [2025-03-08 05:45:42,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2025-03-08 05:45:42,752 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2025-03-08 05:45:42,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:42,752 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2025-03-08 05:45:42,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 17 states have internal predecessors, (31), 7 states have call successors, (7), 1 states have call predecessors, (7), 6 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2025-03-08 05:45:42,752 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2025-03-08 05:45:42,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-03-08 05:45:42,753 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:42,753 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:42,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-08 05:45:42,957 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 [2025-03-08 05:45:42,957 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:42,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:42,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1742358035, now seen corresponding path program 4 times [2025-03-08 05:45:42,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:42,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057153265] [2025-03-08 05:45:42,958 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:45:42,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:42,961 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 34 statements into 2 equivalence classes. [2025-03-08 05:45:42,964 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 28 of 34 statements. [2025-03-08 05:45:42,964 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:45:42,964 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:43,045 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-03-08 05:45:43,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:43,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057153265] [2025-03-08 05:45:43,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057153265] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:43,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016516692] [2025-03-08 05:45:43,045 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:45:43,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:43,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:43,047 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) [2025-03-08 05:45:43,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 05:45:43,075 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 34 statements into 2 equivalence classes. [2025-03-08 05:45:43,081 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 28 of 34 statements. [2025-03-08 05:45:43,082 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:45:43,082 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:43,082 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 05:45:43,085 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:43,116 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-03-08 05:45:43,117 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:43,680 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 05:45:43,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016516692] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:43,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:43,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 15 [2025-03-08 05:45:43,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393677042] [2025-03-08 05:45:43,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:43,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-08 05:45:43,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:43,681 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-08 05:45:43,683 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2025-03-08 05:45:43,683 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2025-03-08 05:45:43,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:43,741 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2025-03-08 05:45:43,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 05:45:43,742 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) Word has length 34 [2025-03-08 05:45:43,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:43,743 INFO L225 Difference]: With dead ends: 31 [2025-03-08 05:45:43,743 INFO L226 Difference]: Without dead ends: 27 [2025-03-08 05:45:43,743 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2025-03-08 05:45:43,744 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:43,744 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 69 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:45:43,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-03-08 05:45:43,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2025-03-08 05:45:43,750 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) [2025-03-08 05:45:43,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2025-03-08 05:45:43,750 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2025-03-08 05:45:43,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:43,752 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2025-03-08 05:45:43,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2025-03-08 05:45:43,752 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2025-03-08 05:45:43,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-03-08 05:45:43,752 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:43,752 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:43,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-08 05:45:43,953 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 [2025-03-08 05:45:43,953 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:43,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:43,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1162593084, now seen corresponding path program 5 times [2025-03-08 05:45:43,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:43,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595304413] [2025-03-08 05:45:43,954 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:45:43,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:43,958 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 40 statements into 6 equivalence classes. [2025-03-08 05:45:43,968 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 40 of 40 statements. [2025-03-08 05:45:43,968 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-08 05:45:43,968 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:44,062 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 05:45:44,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:44,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595304413] [2025-03-08 05:45:44,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595304413] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:44,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098267375] [2025-03-08 05:45:44,063 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:45:44,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:44,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:44,066 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) [2025-03-08 05:45:44,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 05:45:44,098 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 40 statements into 6 equivalence classes. [2025-03-08 05:45:44,109 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 40 of 40 statements. [2025-03-08 05:45:44,110 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-08 05:45:44,110 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:44,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 05:45:44,112 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:44,149 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 05:45:44,149 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:44,969 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-08 05:45:44,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098267375] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:44,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:44,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 17 [2025-03-08 05:45:44,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547700694] [2025-03-08 05:45:44,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:44,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 05:45:44,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:44,971 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 05:45:44,971 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2025-03-08 05:45:44,972 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) [2025-03-08 05:45:45,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:45,035 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2025-03-08 05:45:45,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 05:45:45,035 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) Word has length 40 [2025-03-08 05:45:45,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:45,036 INFO L225 Difference]: With dead ends: 34 [2025-03-08 05:45:45,036 INFO L226 Difference]: Without dead ends: 30 [2025-03-08 05:45:45,036 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2025-03-08 05:45:45,037 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 28 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:45,037 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 60 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:45:45,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-03-08 05:45:45,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2025-03-08 05:45:45,041 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) [2025-03-08 05:45:45,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2025-03-08 05:45:45,041 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2025-03-08 05:45:45,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:45,042 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2025-03-08 05:45:45,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) [2025-03-08 05:45:45,042 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2025-03-08 05:45:45,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-08 05:45:45,042 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:45,043 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:45,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-08 05:45:45,245 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 [2025-03-08 05:45:45,245 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:45,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:45,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1131543565, now seen corresponding path program 6 times [2025-03-08 05:45:45,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:45,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27212938] [2025-03-08 05:45:45,246 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:45:45,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:45,251 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 46 statements into 7 equivalence classes. [2025-03-08 05:45:45,262 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 46 of 46 statements. [2025-03-08 05:45:45,263 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-08 05:45:45,263 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:45,393 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2025-03-08 05:45:45,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:45,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27212938] [2025-03-08 05:45:45,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27212938] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:45,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697640254] [2025-03-08 05:45:45,394 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:45:45,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:45,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:45,397 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) [2025-03-08 05:45:45,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 05:45:45,438 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 46 statements into 7 equivalence classes. [2025-03-08 05:45:45,452 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 46 of 46 statements. [2025-03-08 05:45:45,452 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-08 05:45:45,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:45,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-08 05:45:45,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:45,501 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2025-03-08 05:45:45,501 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:46,629 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-08 05:45:46,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697640254] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:46,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:46,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 17] total 23 [2025-03-08 05:45:46,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714301870] [2025-03-08 05:45:46,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:46,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 05:45:46,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:46,630 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 05:45:46,630 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2025-03-08 05:45:46,630 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 23 states have internal predecessors, (43), 10 states have call successors, (10), 1 states have call predecessors, (10), 9 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2025-03-08 05:45:46,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:46,752 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2025-03-08 05:45:46,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 05:45:46,754 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 23 states have internal predecessors, (43), 10 states have call successors, (10), 1 states have call predecessors, (10), 9 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) Word has length 46 [2025-03-08 05:45:46,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:46,754 INFO L225 Difference]: With dead ends: 37 [2025-03-08 05:45:46,754 INFO L226 Difference]: Without dead ends: 33 [2025-03-08 05:45:46,755 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2025-03-08 05:45:46,755 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 47 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:46,755 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 82 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:45:46,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2025-03-08 05:45:46,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2025-03-08 05:45:46,761 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) [2025-03-08 05:45:46,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2025-03-08 05:45:46,761 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2025-03-08 05:45:46,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:46,762 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2025-03-08 05:45:46,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 23 states have internal predecessors, (43), 10 states have call successors, (10), 1 states have call predecessors, (10), 9 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2025-03-08 05:45:46,762 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2025-03-08 05:45:46,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-03-08 05:45:46,762 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:46,763 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:46,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-08 05:45:46,966 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 [2025-03-08 05:45:46,966 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:46,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:46,966 INFO L85 PathProgramCache]: Analyzing trace with hash 854543964, now seen corresponding path program 7 times [2025-03-08 05:45:46,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:46,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610446961] [2025-03-08 05:45:46,966 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:45:46,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:46,969 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-08 05:45:46,974 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-08 05:45:46,978 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:45:46,978 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:47,101 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2025-03-08 05:45:47,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:47,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610446961] [2025-03-08 05:45:47,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610446961] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:47,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916768654] [2025-03-08 05:45:47,102 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:45:47,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:47,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:47,104 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) [2025-03-08 05:45:47,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 05:45:47,153 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-08 05:45:47,164 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-08 05:45:47,164 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:45:47,164 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:47,164 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 05:45:47,166 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:47,203 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2025-03-08 05:45:47,204 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:48,661 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-08 05:45:48,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916768654] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:48,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:48,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 21 [2025-03-08 05:45:48,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392709034] [2025-03-08 05:45:48,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:48,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 05:45:48,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:48,662 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 05:45:48,662 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2025-03-08 05:45:48,662 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2025-03-08 05:45:48,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:48,734 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2025-03-08 05:45:48,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 05:45:48,735 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) Word has length 52 [2025-03-08 05:45:48,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:48,735 INFO L225 Difference]: With dead ends: 40 [2025-03-08 05:45:48,735 INFO L226 Difference]: Without dead ends: 36 [2025-03-08 05:45:48,736 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 94 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2025-03-08 05:45:48,736 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:48,736 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 84 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:45:48,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-03-08 05:45:48,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2025-03-08 05:45:48,739 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) [2025-03-08 05:45:48,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2025-03-08 05:45:48,740 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2025-03-08 05:45:48,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:48,740 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2025-03-08 05:45:48,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2025-03-08 05:45:48,740 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2025-03-08 05:45:48,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-03-08 05:45:48,741 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:48,741 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:48,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-08 05:45:48,944 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 [2025-03-08 05:45:48,945 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:48,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:48,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1345059283, now seen corresponding path program 8 times [2025-03-08 05:45:48,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:48,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092851042] [2025-03-08 05:45:48,945 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:45:48,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:48,949 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 58 statements into 2 equivalence classes. [2025-03-08 05:45:48,953 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 58 of 58 statements. [2025-03-08 05:45:48,953 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:45:48,953 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:49,143 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2025-03-08 05:45:49,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:49,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092851042] [2025-03-08 05:45:49,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092851042] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:49,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096591697] [2025-03-08 05:45:49,144 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:45:49,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:49,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:49,146 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) [2025-03-08 05:45:49,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 05:45:49,218 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 58 statements into 2 equivalence classes. [2025-03-08 05:45:49,232 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 58 of 58 statements. [2025-03-08 05:45:49,232 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:45:49,232 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:49,233 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-08 05:45:49,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:49,289 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2025-03-08 05:45:49,289 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-08 05:45:51,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096591697] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:51,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:51,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 21] total 25 [2025-03-08 05:45:51,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350393807] [2025-03-08 05:45:51,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:51,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-08 05:45:51,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:51,381 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-08 05:45:51,381 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2025-03-08 05:45:51,381 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 25 states have internal predecessors, (47), 11 states have call successors, (11), 1 states have call predecessors, (11), 10 states have return successors, (19), 9 states have call predecessors, (19), 11 states have call successors, (19) [2025-03-08 05:45:51,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:51,516 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2025-03-08 05:45:51,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 05:45:51,516 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 25 states have internal predecessors, (47), 11 states have call successors, (11), 1 states have call predecessors, (11), 10 states have return successors, (19), 9 states have call predecessors, (19), 11 states have call successors, (19) Word has length 58 [2025-03-08 05:45:51,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:51,517 INFO L225 Difference]: With dead ends: 43 [2025-03-08 05:45:51,517 INFO L226 Difference]: Without dead ends: 39 [2025-03-08 05:45:51,517 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 103 SyntacticMatches, 9 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=355, Invalid=767, Unknown=0, NotChecked=0, Total=1122 [2025-03-08 05:45:51,518 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:51,518 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 107 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:45:51,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2025-03-08 05:45:51,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2025-03-08 05:45:51,521 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) [2025-03-08 05:45:51,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2025-03-08 05:45:51,522 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2025-03-08 05:45:51,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:51,522 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2025-03-08 05:45:51,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 25 states have internal predecessors, (47), 11 states have call successors, (11), 1 states have call predecessors, (11), 10 states have return successors, (19), 9 states have call predecessors, (19), 11 states have call successors, (19) [2025-03-08 05:45:51,522 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2025-03-08 05:45:51,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2025-03-08 05:45:51,523 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:51,523 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:51,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-08 05:45:51,727 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 [2025-03-08 05:45:51,727 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:51,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:51,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1264180868, now seen corresponding path program 9 times [2025-03-08 05:45:51,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:51,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924409396] [2025-03-08 05:45:51,728 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:45:51,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:51,732 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 64 statements into 10 equivalence classes. [2025-03-08 05:45:51,739 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 64 of 64 statements. [2025-03-08 05:45:51,739 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-08 05:45:51,740 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:51,907 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2025-03-08 05:45:51,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:51,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924409396] [2025-03-08 05:45:51,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924409396] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:51,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408434133] [2025-03-08 05:45:51,908 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:45:51,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:51,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:51,909 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) [2025-03-08 05:45:51,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 05:45:52,005 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 64 statements into 10 equivalence classes. [2025-03-08 05:45:52,020 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 64 of 64 statements. [2025-03-08 05:45:52,021 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-08 05:45:52,021 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:52,022 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-08 05:45:52,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:52,079 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2025-03-08 05:45:52,079 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-08 05:45:54,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408434133] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:54,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:54,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 23] total 29 [2025-03-08 05:45:54,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373145141] [2025-03-08 05:45:54,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:54,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-08 05:45:54,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:54,784 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-08 05:45:54,784 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2025-03-08 05:45:54,785 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 29 states have internal predecessors, (56), 13 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (23), 11 states have call predecessors, (23), 13 states have call successors, (23) [2025-03-08 05:45:54,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:54,876 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2025-03-08 05:45:54,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-08 05:45:54,879 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 29 states have internal predecessors, (56), 13 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (23), 11 states have call predecessors, (23), 13 states have call successors, (23) Word has length 64 [2025-03-08 05:45:54,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:54,879 INFO L225 Difference]: With dead ends: 46 [2025-03-08 05:45:54,879 INFO L226 Difference]: Without dead ends: 42 [2025-03-08 05:45:54,880 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 111 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=463, Invalid=943, Unknown=0, NotChecked=0, Total=1406 [2025-03-08 05:45:54,880 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 23 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:54,880 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 106 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:45:54,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2025-03-08 05:45:54,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2025-03-08 05:45:54,886 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) [2025-03-08 05:45:54,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2025-03-08 05:45:54,886 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2025-03-08 05:45:54,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:54,886 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2025-03-08 05:45:54,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 29 states have internal predecessors, (56), 13 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (23), 11 states have call predecessors, (23), 13 states have call successors, (23) [2025-03-08 05:45:54,886 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2025-03-08 05:45:54,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2025-03-08 05:45:54,892 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:54,892 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:54,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-08 05:45:55,093 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 [2025-03-08 05:45:55,093 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:55,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:55,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1425680307, now seen corresponding path program 10 times [2025-03-08 05:45:55,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:55,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610571292] [2025-03-08 05:45:55,095 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:45:55,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:55,102 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 70 statements into 2 equivalence classes. [2025-03-08 05:45:55,108 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 70 of 70 statements. [2025-03-08 05:45:55,108 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 05:45:55,108 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:55,525 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2025-03-08 05:45:55,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:55,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610571292] [2025-03-08 05:45:55,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610571292] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:55,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718323498] [2025-03-08 05:45:55,526 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:45:55,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:55,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:55,527 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) [2025-03-08 05:45:55,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 05:45:55,666 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 70 statements into 2 equivalence classes. [2025-03-08 05:45:55,681 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 70 of 70 statements. [2025-03-08 05:45:55,681 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 05:45:55,681 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:55,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-03-08 05:45:55,687 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:55,727 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2025-03-08 05:45:55,727 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:56,069 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2025-03-08 05:45:56,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718323498] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:56,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:56,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 25 [2025-03-08 05:45:56,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596761508] [2025-03-08 05:45:56,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:56,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-08 05:45:56,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:56,070 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-08 05:45:56,071 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2025-03-08 05:45:56,071 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 25 states, 25 states have (on average 1.16) internal successors, (29), 14 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2025-03-08 05:45:56,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:56,221 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2025-03-08 05:45:56,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-08 05:45:56,222 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 14 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) Word has length 70 [2025-03-08 05:45:56,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:56,222 INFO L225 Difference]: With dead ends: 49 [2025-03-08 05:45:56,222 INFO L226 Difference]: Without dead ends: 45 [2025-03-08 05:45:56,223 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2025-03-08 05:45:56,223 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:56,223 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 633 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:45:56,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2025-03-08 05:45:56,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2025-03-08 05:45:56,226 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) [2025-03-08 05:45:56,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2025-03-08 05:45:56,227 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2025-03-08 05:45:56,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:56,227 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2025-03-08 05:45:56,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 14 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2025-03-08 05:45:56,227 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2025-03-08 05:45:56,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2025-03-08 05:45:56,228 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:56,228 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:56,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-08 05:45:56,428 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 [2025-03-08 05:45:56,428 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:56,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:56,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1101675676, now seen corresponding path program 11 times [2025-03-08 05:45:56,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:56,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492601832] [2025-03-08 05:45:56,429 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:45:56,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:56,434 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 76 statements into 12 equivalence classes. [2025-03-08 05:45:56,442 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 76 of 76 statements. [2025-03-08 05:45:56,443 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-03-08 05:45:56,443 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2025-03-08 05:45:56,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:56,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492601832] [2025-03-08 05:45:56,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492601832] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:45:56,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:45:56,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2025-03-08 05:45:56,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402309872] [2025-03-08 05:45:56,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:45:56,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-08 05:45:56,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:56,633 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-08 05:45:56,633 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2025-03-08 05:45:56,633 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 12 states have call predecessors, (12), 2 states have call successors, (12) [2025-03-08 05:45:56,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:56,733 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2025-03-08 05:45:56,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 05:45:56,733 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 12 states have call predecessors, (12), 2 states have call successors, (12) Word has length 76 [2025-03-08 05:45:56,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:56,734 INFO L225 Difference]: With dead ends: 45 [2025-03-08 05:45:56,734 INFO L226 Difference]: Without dead ends: 0 [2025-03-08 05:45:56,734 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=260, Invalid=442, Unknown=0, NotChecked=0, Total=702 [2025-03-08 05:45:56,735 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:56,735 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 98 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:45:56,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-03-08 05:45:56,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-03-08 05:45:56,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 05:45:56,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-03-08 05:45:56,735 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 76 [2025-03-08 05:45:56,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:56,735 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-03-08 05:45:56,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 12 states have call predecessors, (12), 2 states have call successors, (12) [2025-03-08 05:45:56,735 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-03-08 05:45:56,735 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-03-08 05:45:56,739 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-03-08 05:45:56,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-03-08 05:45:56,742 INFO L422 BasicCegarLoop]: Path program histogram: [11, 1] [2025-03-08 05:45:56,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2025-03-08 05:45:56,958 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-08 05:45:56,961 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.03 05:45:56 BoogieIcfgContainer [2025-03-08 05:45:56,961 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-08 05:45:56,962 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-08 05:45:56,962 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-08 05:45:56,962 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-08 05:45:56,962 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:45:40" (3/4) ... [2025-03-08 05:45:56,964 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-03-08 05:45:56,968 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure id [2025-03-08 05:45:56,971 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2025-03-08 05:45:56,971 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2025-03-08 05:45:56,971 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2025-03-08 05:45:56,971 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-03-08 05:45:57,019 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-03-08 05:45:57,020 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-03-08 05:45:57,020 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-08 05:45:57,021 INFO L158 Benchmark]: Toolchain (without parser) took 16952.17ms. Allocated memory was 167.8MB in the beginning and 243.3MB in the end (delta: 75.5MB). Free memory was 123.9MB in the beginning and 147.0MB in the end (delta: -23.1MB). Peak memory consumption was 53.1MB. Max. memory is 16.1GB. [2025-03-08 05:45:57,021 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 201.3MB. Free memory is still 116.6MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 05:45:57,021 INFO L158 Benchmark]: CACSL2BoogieTranslator took 135.00ms. Allocated memory is still 167.8MB. Free memory was 122.9MB in the beginning and 112.9MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-08 05:45:57,021 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.11ms. Allocated memory is still 167.8MB. Free memory was 112.9MB in the beginning and 111.9MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 05:45:57,022 INFO L158 Benchmark]: Boogie Preprocessor took 20.11ms. Allocated memory is still 167.8MB. Free memory was 111.9MB in the beginning and 110.9MB in the end (delta: 993.4kB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 05:45:57,022 INFO L158 Benchmark]: IcfgBuilder took 164.67ms. Allocated memory is still 167.8MB. Free memory was 110.9MB in the beginning and 101.1MB in the end (delta: 9.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-08 05:45:57,022 INFO L158 Benchmark]: TraceAbstraction took 16549.29ms. Allocated memory was 167.8MB in the beginning and 243.3MB in the end (delta: 75.5MB). Free memory was 101.1MB in the beginning and 152.6MB in the end (delta: -51.5MB). Peak memory consumption was 105.8MB. Max. memory is 16.1GB. [2025-03-08 05:45:57,022 INFO L158 Benchmark]: Witness Printer took 58.31ms. Allocated memory is still 243.3MB. Free memory was 152.6MB in the beginning and 147.0MB in the end (delta: 5.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-08 05:45:57,023 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 201.3MB. Free memory is still 116.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 135.00ms. Allocated memory is still 167.8MB. Free memory was 122.9MB in the beginning and 112.9MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.11ms. Allocated memory is still 167.8MB. Free memory was 112.9MB in the beginning and 111.9MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 20.11ms. Allocated memory is still 167.8MB. Free memory was 111.9MB in the beginning and 110.9MB in the end (delta: 993.4kB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 164.67ms. Allocated memory is still 167.8MB. Free memory was 110.9MB in the beginning and 101.1MB in the end (delta: 9.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 16549.29ms. Allocated memory was 167.8MB in the beginning and 243.3MB in the end (delta: 75.5MB). Free memory was 101.1MB in the beginning and 152.6MB in the end (delta: -51.5MB). Peak memory consumption was 105.8MB. Max. memory is 16.1GB. * Witness Printer took 58.31ms. Allocated memory is still 243.3MB. Free memory was 152.6MB in the beginning and 147.0MB in the end (delta: 5.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 20 edges, 1 error locations. Started 1 CEGAR loops. OverallTime: 16.3s, OverallIterations: 12, TraceHistogramMax: 12, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 289 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 240 mSDsluCounter, 1426 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1253 mSDsCounter, 81 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 888 IncrementalHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 81 mSolverCounterUnsat, 173 mSDtfsCounter, 888 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1092 GetRequests, 786 SyntacticMatches, 55 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=11, InterpolantAutomatonStates: 136, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 12.2s InterpolantComputationTime, 946 NumberOfCodeBlocks, 934 NumberOfCodeBlocksAsserted, 85 NumberOfCheckSat, 1344 ConstructedInterpolants, 0 QuantifiedInterpolants, 3680 SizeOfPredicates, 45 NumberOfNonLiveVariables, 1151 ConjunctsInSsa, 173 ConjunctsInUnsatCore, 32 InterpolantComputations, 2 PerfectInterpolantSequences, 1840/4004 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-03-08 05:45:57,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE