./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 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/bitvector-regression/recHanoi03-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5a58a565ed7a29809aaccd8966118196fec0a697f2fc6db04cc260beeab4df83 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 09:44:39,163 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 09:44:39,216 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 09:44:39,220 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 09:44:39,221 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 09:44:39,242 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 09:44:39,243 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 09:44:39,243 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 09:44:39,243 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 09:44:39,243 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 09:44:39,243 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 09:44:39,243 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 09:44:39,243 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 09:44:39,244 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 09:44:39,244 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 09:44:39,244 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 09:44:39,244 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 09:44:39,244 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 09:44:39,244 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 09:44:39,244 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 09:44:39,244 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 09:44:39,244 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 09:44:39,244 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 09:44:39,244 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 09:44:39,244 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 09:44:39,244 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 09:44:39,244 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 09:44:39,244 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 09:44:39,244 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 09:44:39,244 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 09:44:39,245 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 09:44:39,245 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 09:44:39,245 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 09:44:39,245 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 09:44:39,245 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 09:44:39,245 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 09:44:39,245 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 09:44:39,245 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 09:44:39,245 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 09:44:39,245 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 09:44:39,245 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 09:44:39,245 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 09:44:39,245 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 09:44:39,245 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 -> 5a58a565ed7a29809aaccd8966118196fec0a697f2fc6db04cc260beeab4df83 [2025-03-03 09:44:39,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 09:44:39,479 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 09:44:39,480 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 09:44:39,481 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 09:44:39,482 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 09:44:39,483 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2025-03-03 09:44:40,614 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/783a2dfb2/e21a6f707e8c45bda54e2b45a987de62/FLAGc08f96b31 [2025-03-03 09:44:40,795 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 09:44:40,807 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2025-03-03 09:44:40,817 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/783a2dfb2/e21a6f707e8c45bda54e2b45a987de62/FLAGc08f96b31 [2025-03-03 09:44:41,173 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/783a2dfb2/e21a6f707e8c45bda54e2b45a987de62 [2025-03-03 09:44:41,174 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 09:44:41,175 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 09:44:41,176 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 09:44:41,176 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 09:44:41,179 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 09:44:41,179 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 09:44:41" (1/1) ... [2025-03-03 09:44:41,180 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5596b45e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:41, skipping insertion in model container [2025-03-03 09:44:41,180 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 09:44:41" (1/1) ... [2025-03-03 09:44:41,188 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 09:44:41,288 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/bitvector-regression/recHanoi03-1.c[838,851] [2025-03-03 09:44:41,292 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 09:44:41,300 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 09:44:41,308 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/bitvector-regression/recHanoi03-1.c[838,851] [2025-03-03 09:44:41,310 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 09:44:41,318 INFO L204 MainTranslator]: Completed translation [2025-03-03 09:44:41,319 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:41 WrapperNode [2025-03-03 09:44:41,320 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 09:44:41,320 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 09:44:41,320 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 09:44:41,321 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 09:44:41,325 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:41" (1/1) ... [2025-03-03 09:44:41,328 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:41" (1/1) ... [2025-03-03 09:44:41,337 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 37 [2025-03-03 09:44:41,338 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 09:44:41,339 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 09:44:41,339 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 09:44:41,339 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 09:44:41,344 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:41" (1/1) ... [2025-03-03 09:44:41,344 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:41" (1/1) ... [2025-03-03 09:44:41,345 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:41" (1/1) ... [2025-03-03 09:44:41,352 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]. [2025-03-03 09:44:41,353 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:41" (1/1) ... [2025-03-03 09:44:41,353 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:41" (1/1) ... [2025-03-03 09:44:41,356 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:41" (1/1) ... [2025-03-03 09:44:41,359 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:41" (1/1) ... [2025-03-03 09:44:41,359 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:41" (1/1) ... [2025-03-03 09:44:41,359 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:41" (1/1) ... [2025-03-03 09:44:41,360 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 09:44:41,362 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 09:44:41,362 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 09:44:41,362 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 09:44:41,362 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:41" (1/1) ... [2025-03-03 09:44:41,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 09:44:41,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:41,386 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) [2025-03-03 09:44:41,389 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 [2025-03-03 09:44:41,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 09:44:41,407 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2025-03-03 09:44:41,407 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2025-03-03 09:44:41,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 09:44:41,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 09:44:41,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 09:44:41,451 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 09:44:41,452 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 09:44:41,488 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L22: havoc #t~ret4; [2025-03-03 09:44:41,529 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2025-03-03 09:44:41,529 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 09:44:41,537 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 09:44:41,537 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 09:44:41,537 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 09:44:41 BoogieIcfgContainer [2025-03-03 09:44:41,537 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 09:44:41,539 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 09:44:41,539 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 09:44:41,542 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 09:44:41,542 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 09:44:41" (1/3) ... [2025-03-03 09:44:41,543 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc5eed2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 09:44:41, skipping insertion in model container [2025-03-03 09:44:41,543 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:41" (2/3) ... [2025-03-03 09:44:41,543 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc5eed2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 09:44:41, skipping insertion in model container [2025-03-03 09:44:41,543 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 09:44:41" (3/3) ... [2025-03-03 09:44:41,545 INFO L128 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2025-03-03 09:44:41,555 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 09:44:41,556 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recHanoi03-1.c that has 2 procedures, 21 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-03 09:44:41,593 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 09:44:41,603 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;@19a228e0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 09:44:41,603 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 09:44:41,606 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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) [2025-03-03 09:44:41,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-03 09:44:41,611 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:41,611 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:41,611 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:41,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:41,616 INFO L85 PathProgramCache]: Analyzing trace with hash 970900155, now seen corresponding path program 1 times [2025-03-03 09:44:41,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:41,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716230207] [2025-03-03 09:44:41,623 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:41,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:41,672 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-03 09:44:41,688 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-03 09:44:41,688 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:41,688 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:41,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:44:41,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:41,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716230207] [2025-03-03 09:44:41,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716230207] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:44:41,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 09:44:41,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 09:44:41,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180877886] [2025-03-03 09:44:41,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:44:41,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 09:44:41,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:41,826 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 09:44:41,826 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 09:44:41,827 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2025-03-03 09:44:41,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:41,874 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2025-03-03 09:44:41,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 09:44:41,879 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 12 [2025-03-03 09:44:41,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:41,884 INFO L225 Difference]: With dead ends: 31 [2025-03-03 09:44:41,884 INFO L226 Difference]: Without dead ends: 22 [2025-03-03 09:44:41,887 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 [2025-03-03 09:44:41,892 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:41,894 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:44:41,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2025-03-03 09:44:41,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2025-03-03 09:44:41,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:44:41,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2025-03-03 09:44:41,920 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12 [2025-03-03 09:44:41,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:41,920 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2025-03-03 09:44:41,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2025-03-03 09:44:41,920 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2025-03-03 09:44:41,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-03-03 09:44:41,921 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:41,921 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:41,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 09:44:41,921 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:41,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:41,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1026284089, now seen corresponding path program 1 times [2025-03-03 09:44:41,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:41,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501642790] [2025-03-03 09:44:41,922 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:41,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:41,927 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-03 09:44:41,931 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-03 09:44:41,931 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:41,932 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:41,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:44:41,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:41,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501642790] [2025-03-03 09:44:41,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501642790] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:44:41,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 09:44:41,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-03 09:44:41,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501184631] [2025-03-03 09:44:41,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:44:41,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-03 09:44:41,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:41,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-03 09:44:41,957 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-03 09:44:41,957 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2025-03-03 09:44:41,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:41,973 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2025-03-03 09:44:41,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-03 09:44:41,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 14 [2025-03-03 09:44:41,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:41,975 INFO L225 Difference]: With dead ends: 29 [2025-03-03 09:44:41,975 INFO L226 Difference]: Without dead ends: 25 [2025-03-03 09:44:41,975 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-03 09:44:41,976 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:41,976 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 32 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:44:41,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-03-03 09:44:41,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2025-03-03 09:44:41,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:44:41,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2025-03-03 09:44:41,981 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2025-03-03 09:44:41,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:41,981 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2025-03-03 09:44:41,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2025-03-03 09:44:41,982 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2025-03-03 09:44:41,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-03 09:44:41,983 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:41,983 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:41,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-03 09:44:41,984 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:41,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:41,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1753373282, now seen corresponding path program 1 times [2025-03-03 09:44:41,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:41,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954750570] [2025-03-03 09:44:41,984 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:41,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:41,989 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-03 09:44:41,998 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-03 09:44:41,998 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:41,998 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-03 09:44:41,998 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-03 09:44:42,002 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-03 09:44:42,011 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-03 09:44:42,011 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:42,011 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-03 09:44:42,023 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-03 09:44:42,023 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-03 09:44:42,023 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-03-03 09:44:42,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-03 09:44:42,031 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2025-03-03 09:44:42,044 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-03 09:44:42,047 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.03 09:44:42 BoogieIcfgContainer [2025-03-03 09:44:42,047 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-03 09:44:42,048 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-03 09:44:42,048 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-03 09:44:42,048 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-03 09:44:42,049 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 09:44:41" (3/4) ... [2025-03-03 09:44:42,051 INFO L149 WitnessPrinter]: No result that supports witness generation found [2025-03-03 09:44:42,052 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-03 09:44:42,052 INFO L158 Benchmark]: Toolchain (without parser) took 877.06ms. Allocated memory is still 142.6MB. Free memory was 110.9MB in the beginning and 55.3MB in the end (delta: 55.6MB). Peak memory consumption was 58.7MB. Max. memory is 16.1GB. [2025-03-03 09:44:42,052 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 201.3MB. Free memory is still 127.0MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-03 09:44:42,053 INFO L158 Benchmark]: CACSL2BoogieTranslator took 143.69ms. Allocated memory is still 142.6MB. Free memory was 110.9MB in the beginning and 100.5MB in the end (delta: 10.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-03 09:44:42,053 INFO L158 Benchmark]: Boogie Procedure Inliner took 17.81ms. Allocated memory is still 142.6MB. Free memory was 100.5MB in the beginning and 99.4MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-03 09:44:42,053 INFO L158 Benchmark]: Boogie Preprocessor took 21.51ms. Allocated memory is still 142.6MB. Free memory was 99.4MB in the beginning and 98.4MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-03 09:44:42,053 INFO L158 Benchmark]: IcfgBuilder took 175.48ms. Allocated memory is still 142.6MB. Free memory was 98.4MB in the beginning and 87.8MB in the end (delta: 10.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-03 09:44:42,053 INFO L158 Benchmark]: TraceAbstraction took 508.57ms. Allocated memory is still 142.6MB. Free memory was 86.8MB in the beginning and 55.3MB in the end (delta: 31.5MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2025-03-03 09:44:42,053 INFO L158 Benchmark]: Witness Printer took 3.50ms. Allocated memory is still 142.6MB. Free memory is still 55.3MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-03 09:44:42,056 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 201.3MB. Free memory is still 127.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 143.69ms. Allocated memory is still 142.6MB. Free memory was 110.9MB in the beginning and 100.5MB in the end (delta: 10.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 17.81ms. Allocated memory is still 142.6MB. Free memory was 100.5MB in the beginning and 99.4MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 21.51ms. Allocated memory is still 142.6MB. Free memory was 99.4MB in the beginning and 98.4MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 175.48ms. Allocated memory is still 142.6MB. Free memory was 98.4MB in the beginning and 87.8MB in the end (delta: 10.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 508.57ms. Allocated memory is still 142.6MB. Free memory was 86.8MB in the beginning and 55.3MB in the end (delta: 31.5MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Witness Printer took 3.50ms. Allocated memory is still 142.6MB. Free memory is still 55.3MB. There was no memory consumed. 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 - UnprovableResult [Line: 36]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 33. Possible FailurePath: [L27] int n = __VERIFIER_nondet_int(); [L28] COND FALSE !(n < 1) VAL [n=1] [L31] CALL, EXPR hanoi(n) VAL [\old(n)=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1] [L31] RET, EXPR hanoi(n) VAL [n=1] [L31] unsigned result = hanoi(n); [L33] result+1>0 && result+1 == 1<0 && result+1 == 1<0 && result+1 == 1< 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 -> 5a58a565ed7a29809aaccd8966118196fec0a697f2fc6db04cc260beeab4df83 [2025-03-03 09:44:44,097 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 09:44:44,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 09:44:44,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 09:44:44,104 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 09:44:44,104 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 09:44:44,106 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2025-03-03 09:44:45,181 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/926b79f7c/69cf6ac84f1844a081fc2c1e5a5a54ed/FLAG5cb437320 [2025-03-03 09:44:45,361 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 09:44:45,361 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2025-03-03 09:44:45,365 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/926b79f7c/69cf6ac84f1844a081fc2c1e5a5a54ed/FLAG5cb437320 [2025-03-03 09:44:45,754 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/926b79f7c/69cf6ac84f1844a081fc2c1e5a5a54ed [2025-03-03 09:44:45,756 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 09:44:45,757 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 09:44:45,758 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 09:44:45,758 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 09:44:45,760 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 09:44:45,761 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 09:44:45" (1/1) ... [2025-03-03 09:44:45,761 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1aface42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:45, skipping insertion in model container [2025-03-03 09:44:45,761 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 09:44:45" (1/1) ... [2025-03-03 09:44:45,769 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 09:44:45,871 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/bitvector-regression/recHanoi03-1.c[838,851] [2025-03-03 09:44:45,874 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 09:44:45,884 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 09:44:45,895 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/bitvector-regression/recHanoi03-1.c[838,851] [2025-03-03 09:44:45,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 09:44:45,907 INFO L204 MainTranslator]: Completed translation [2025-03-03 09:44:45,908 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:45 WrapperNode [2025-03-03 09:44:45,908 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 09:44:45,909 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 09:44:45,909 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 09:44:45,909 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 09:44:45,913 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:45" (1/1) ... [2025-03-03 09:44:45,919 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:45" (1/1) ... [2025-03-03 09:44:45,930 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2025-03-03 09:44:45,931 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 09:44:45,931 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 09:44:45,932 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 09:44:45,932 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 09:44:45,936 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:45" (1/1) ... [2025-03-03 09:44:45,936 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:45" (1/1) ... [2025-03-03 09:44:45,937 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:45" (1/1) ... [2025-03-03 09:44:45,945 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]. [2025-03-03 09:44:45,945 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:45" (1/1) ... [2025-03-03 09:44:45,945 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:45" (1/1) ... [2025-03-03 09:44:45,951 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:45" (1/1) ... [2025-03-03 09:44:45,953 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:45" (1/1) ... [2025-03-03 09:44:45,954 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:45" (1/1) ... [2025-03-03 09:44:45,954 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:45" (1/1) ... [2025-03-03 09:44:45,955 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 09:44:45,957 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 09:44:45,957 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 09:44:45,957 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 09:44:45,958 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:45" (1/1) ... [2025-03-03 09:44:45,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 09:44:45,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:45,981 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) [2025-03-03 09:44:45,984 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 [2025-03-03 09:44:46,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 09:44:46,002 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2025-03-03 09:44:46,002 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2025-03-03 09:44:46,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 09:44:46,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 09:44:46,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2025-03-03 09:44:46,043 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 09:44:46,044 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 09:44:46,079 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L22: havoc #t~ret4; [2025-03-03 09:44:46,112 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2025-03-03 09:44:46,112 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 09:44:46,120 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 09:44:46,121 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 09:44:46,121 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 09:44:46 BoogieIcfgContainer [2025-03-03 09:44:46,121 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 09:44:46,123 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 09:44:46,124 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 09:44:46,128 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 09:44:46,129 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 09:44:45" (1/3) ... [2025-03-03 09:44:46,129 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5501d97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 09:44:46, skipping insertion in model container [2025-03-03 09:44:46,130 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:45" (2/3) ... [2025-03-03 09:44:46,130 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5501d97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 09:44:46, skipping insertion in model container [2025-03-03 09:44:46,130 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 09:44:46" (3/3) ... [2025-03-03 09:44:46,131 INFO L128 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2025-03-03 09:44:46,141 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 09:44:46,142 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recHanoi03-1.c that has 2 procedures, 17 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-03 09:44:46,178 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 09:44:46,187 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;@717f8021, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 09:44:46,188 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 09:44:46,192 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 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) [2025-03-03 09:44:46,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-03 09:44:46,196 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:46,197 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:46,197 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:46,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:46,202 INFO L85 PathProgramCache]: Analyzing trace with hash 2107154262, now seen corresponding path program 1 times [2025-03-03 09:44:46,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-03 09:44:46,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712688973] [2025-03-03 09:44:46,212 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:46,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:46,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:46,215 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) [2025-03-03 09:44:46,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 09:44:46,266 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-03 09:44:46,276 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-03 09:44:46,277 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:46,277 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:46,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 09:44:46,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:44:46,430 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 09:44:46,430 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-03 09:44:46,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712688973] [2025-03-03 09:44:46,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712688973] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:44:46,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 09:44:46,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-03 09:44:46,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755827975] [2025-03-03 09:44:46,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:44:46,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-03 09:44:46,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-03 09:44:46,448 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-03 09:44:46,450 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-03 09:44:46,451 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 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 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-03 09:44:46,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:46,536 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2025-03-03 09:44:46,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-03 09:44:46,538 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2025-03-03 09:44:46,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:46,542 INFO L225 Difference]: With dead ends: 26 [2025-03-03 09:44:46,543 INFO L226 Difference]: Without dead ends: 16 [2025-03-03 09:44:46,544 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-03 09:44:46,547 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:46,547 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 45 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:44:46,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2025-03-03 09:44:46,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2025-03-03 09:44:46,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 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) [2025-03-03 09:44:46,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2025-03-03 09:44:46,574 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2025-03-03 09:44:46,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:46,574 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2025-03-03 09:44:46,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-03 09:44:46,574 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2025-03-03 09:44:46,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-03 09:44:46,576 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:46,576 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:46,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-03 09:44:46,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:46,776 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:46,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:46,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1567074711, now seen corresponding path program 1 times [2025-03-03 09:44:46,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-03 09:44:46,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1116682031] [2025-03-03 09:44:46,777 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:46,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:46,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:46,779 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) [2025-03-03 09:44:46,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 09:44:46,815 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-03 09:44:46,822 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-03 09:44:46,822 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:46,822 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:46,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 09:44:46,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:46,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-03 09:44:46,960 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:44:47,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 09:44:47,322 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-03 09:44:47,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116682031] [2025-03-03 09:44:47,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116682031] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:44:47,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 09:44:47,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2025-03-03 09:44:47,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993149264] [2025-03-03 09:44:47,323 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 09:44:47,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-03 09:44:47,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-03 09:44:47,324 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-03 09:44:47,324 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2025-03-03 09:44:47,324 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-03 09:44:47,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:47,568 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2025-03-03 09:44:47,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 09:44:47,569 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 17 [2025-03-03 09:44:47,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:47,569 INFO L225 Difference]: With dead ends: 28 [2025-03-03 09:44:47,569 INFO L226 Difference]: Without dead ends: 22 [2025-03-03 09:44:47,570 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2025-03-03 09:44:47,570 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:47,570 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 59 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:44:47,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2025-03-03 09:44:47,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2025-03-03 09:44:47,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 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) [2025-03-03 09:44:47,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2025-03-03 09:44:47,577 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2025-03-03 09:44:47,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:47,577 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2025-03-03 09:44:47,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-03 09:44:47,577 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2025-03-03 09:44:47,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-03 09:44:47,578 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:47,578 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:47,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-03 09:44:47,778 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 [2025-03-03 09:44:47,779 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:47,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:47,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1891123639, now seen corresponding path program 2 times [2025-03-03 09:44:47,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-03 09:44:47,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [73996267] [2025-03-03 09:44:47,780 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:44:47,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:47,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:47,782 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) [2025-03-03 09:44:47,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-03 09:44:47,803 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-03-03 09:44:47,811 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 09:44:47,811 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:44:47,811 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:47,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-03 09:44:47,813 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:47,988 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-03 09:44:47,988 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:44:48,775 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 09:44:48,775 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-03 09:44:48,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73996267] [2025-03-03 09:44:48,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73996267] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:44:48,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 09:44:48,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2025-03-03 09:44:48,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966613092] [2025-03-03 09:44:48,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 09:44:48,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-03 09:44:48,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-03 09:44:48,776 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-03 09:44:48,776 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2025-03-03 09:44:48,777 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 26 states, 25 states have (on average 1.36) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2025-03-03 09:44:49,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:49,186 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2025-03-03 09:44:49,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-03 09:44:49,186 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.36) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 29 [2025-03-03 09:44:49,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:49,187 INFO L225 Difference]: With dead ends: 34 [2025-03-03 09:44:49,187 INFO L226 Difference]: Without dead ends: 28 [2025-03-03 09:44:49,188 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2025-03-03 09:44:49,188 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 38 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:49,188 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 122 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 09:44:49,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-03-03 09:44:49,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2025-03-03 09:44:49,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 20 states have internal predecessors, (20), 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) [2025-03-03 09:44:49,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2025-03-03 09:44:49,193 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 29 [2025-03-03 09:44:49,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:49,193 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2025-03-03 09:44:49,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.36) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2025-03-03 09:44:49,193 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2025-03-03 09:44:49,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-03 09:44:49,194 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:49,194 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:49,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-03 09:44:49,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:49,395 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:49,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:49,395 INFO L85 PathProgramCache]: Analyzing trace with hash -169483817, now seen corresponding path program 3 times [2025-03-03 09:44:49,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-03 09:44:49,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [733093823] [2025-03-03 09:44:49,395 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:44:49,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:49,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:49,397 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) [2025-03-03 09:44:49,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-03 09:44:49,421 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 41 statements into 6 equivalence classes. [2025-03-03 09:44:49,433 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 41 of 41 statements. [2025-03-03 09:44:49,433 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-03 09:44:49,433 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:49,434 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-03 09:44:49,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-03 09:44:49,661 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:44:50,975 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-03 09:44:50,976 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-03 09:44:50,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733093823] [2025-03-03 09:44:50,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733093823] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:44:50,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 09:44:50,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2025-03-03 09:44:50,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363845264] [2025-03-03 09:44:50,976 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 09:44:50,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-03-03 09:44:50,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-03 09:44:50,977 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-03-03 09:44:50,977 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2025-03-03 09:44:50,977 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 24 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) [2025-03-03 09:44:51,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:51,535 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2025-03-03 09:44:51,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-03 09:44:51,535 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 24 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) Word has length 41 [2025-03-03 09:44:51,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:51,536 INFO L225 Difference]: With dead ends: 40 [2025-03-03 09:44:51,536 INFO L226 Difference]: Without dead ends: 34 [2025-03-03 09:44:51,537 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=277, Invalid=2173, Unknown=0, NotChecked=0, Total=2450 [2025-03-03 09:44:51,537 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 64 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:51,538 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 180 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 09:44:51,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-03-03 09:44:51,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2025-03-03 09:44:51,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 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) [2025-03-03 09:44:51,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2025-03-03 09:44:51,543 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 41 [2025-03-03 09:44:51,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:51,543 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2025-03-03 09:44:51,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 24 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) [2025-03-03 09:44:51,544 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2025-03-03 09:44:51,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-03 09:44:51,544 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:51,544 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:51,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-03 09:44:51,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:51,745 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:51,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:51,745 INFO L85 PathProgramCache]: Analyzing trace with hash -962950665, now seen corresponding path program 4 times [2025-03-03 09:44:51,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-03 09:44:51,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1688754138] [2025-03-03 09:44:51,746 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:44:51,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:51,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:51,748 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) [2025-03-03 09:44:51,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-03 09:44:51,770 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 53 statements into 2 equivalence classes. [2025-03-03 09:44:51,779 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 52 of 53 statements. [2025-03-03 09:44:51,779 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 09:44:51,779 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:51,780 WARN L254 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-03 09:44:51,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:52,070 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2025-03-03 09:44:52,070 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:44:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-03 09:44:53,908 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-03 09:44:53,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688754138] [2025-03-03 09:44:53,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688754138] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:44:53,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 09:44:53,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27] total 46 [2025-03-03 09:44:53,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683607599] [2025-03-03 09:44:53,909 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 09:44:53,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2025-03-03 09:44:53,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-03 09:44:53,910 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2025-03-03 09:44:53,910 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1913, Unknown=0, NotChecked=0, Total=2070 [2025-03-03 09:44:53,911 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 30 states have internal predecessors, (58), 10 states have call successors, (10), 1 states have call predecessors, (10), 16 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) [2025-03-03 09:44:54,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:54,717 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2025-03-03 09:44:54,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-03 09:44:54,717 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 30 states have internal predecessors, (58), 10 states have call successors, (10), 1 states have call predecessors, (10), 16 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) Word has length 53 [2025-03-03 09:44:54,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:54,718 INFO L225 Difference]: With dead ends: 46 [2025-03-03 09:44:54,718 INFO L226 Difference]: Without dead ends: 40 [2025-03-03 09:44:54,719 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=399, Invalid=3633, Unknown=0, NotChecked=0, Total=4032 [2025-03-03 09:44:54,720 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 86 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:54,720 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 326 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-03 09:44:54,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2025-03-03 09:44:54,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2025-03-03 09:44:54,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 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) [2025-03-03 09:44:54,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2025-03-03 09:44:54,724 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 53 [2025-03-03 09:44:54,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:54,724 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2025-03-03 09:44:54,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 30 states have internal predecessors, (58), 10 states have call successors, (10), 1 states have call predecessors, (10), 16 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) [2025-03-03 09:44:54,724 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2025-03-03 09:44:54,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-03-03 09:44:54,725 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:54,725 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:54,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-03 09:44:54,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:54,926 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:54,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:54,926 INFO L85 PathProgramCache]: Analyzing trace with hash 2097166871, now seen corresponding path program 5 times [2025-03-03 09:44:54,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-03 09:44:54,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1346213943] [2025-03-03 09:44:54,927 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:44:54,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:54,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:54,928 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) [2025-03-03 09:44:54,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-03 09:44:54,955 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 65 statements into 10 equivalence classes. [2025-03-03 09:44:54,971 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 65 of 65 statements. [2025-03-03 09:44:54,971 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-03-03 09:44:54,971 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:54,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-03-03 09:44:54,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:55,296 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2025-03-03 09:44:55,296 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:44:57,765 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-03 09:44:57,766 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-03 09:44:57,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346213943] [2025-03-03 09:44:57,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346213943] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:44:57,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 09:44:57,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 33] total 56 [2025-03-03 09:44:57,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411444927] [2025-03-03 09:44:57,766 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 09:44:57,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2025-03-03 09:44:57,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-03 09:44:57,767 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2025-03-03 09:44:57,767 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2885, Unknown=0, NotChecked=0, Total=3080 [2025-03-03 09:44:57,768 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 36 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 20 states have return successors, (20), 20 states have call predecessors, (20), 12 states have call successors, (20) [2025-03-03 09:44:58,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:58,980 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2025-03-03 09:44:58,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-03 09:44:58,981 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 36 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 20 states have return successors, (20), 20 states have call predecessors, (20), 12 states have call successors, (20) Word has length 65 [2025-03-03 09:44:58,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:58,982 INFO L225 Difference]: With dead ends: 52 [2025-03-03 09:44:58,982 INFO L226 Difference]: Without dead ends: 46 [2025-03-03 09:44:58,984 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=537, Invalid=5469, Unknown=0, NotChecked=0, Total=6006 [2025-03-03 09:44:58,984 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 106 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:58,984 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 438 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-03 09:44:58,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-03-03 09:44:58,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2025-03-03 09:44:58,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.032258064516129) internal successors, (32), 32 states have internal predecessors, (32), 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) [2025-03-03 09:44:58,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2025-03-03 09:44:58,993 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 65 [2025-03-03 09:44:58,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:58,995 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2025-03-03 09:44:58,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 36 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 20 states have return successors, (20), 20 states have call predecessors, (20), 12 states have call successors, (20) [2025-03-03 09:44:58,995 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2025-03-03 09:44:58,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2025-03-03 09:44:58,995 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:58,996 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:59,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-03 09:44:59,196 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:59,196 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:59,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:59,197 INFO L85 PathProgramCache]: Analyzing trace with hash 331412023, now seen corresponding path program 6 times [2025-03-03 09:44:59,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-03 09:44:59,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1439644015] [2025-03-03 09:44:59,197 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:44:59,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:59,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:59,199 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) [2025-03-03 09:44:59,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-03 09:44:59,232 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 77 statements into 12 equivalence classes. [2025-03-03 09:44:59,257 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) and asserted 77 of 77 statements. [2025-03-03 09:44:59,257 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2025-03-03 09:44:59,257 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:59,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 52 conjuncts are in the unsatisfiable core [2025-03-03 09:44:59,262 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:59,644 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2025-03-03 09:44:59,644 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:45:02,995 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-03-03 09:45:02,995 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-03 09:45:02,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439644015] [2025-03-03 09:45:02,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439644015] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:45:02,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 09:45:02,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 39] total 66 [2025-03-03 09:45:02,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463150711] [2025-03-03 09:45:02,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 09:45:02,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2025-03-03 09:45:02,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-03 09:45:02,996 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2025-03-03 09:45:02,997 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=4057, Unknown=0, NotChecked=0, Total=4290 [2025-03-03 09:45:02,997 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 42 states have internal predecessors, (82), 14 states have call successors, (14), 1 states have call predecessors, (14), 24 states have return successors, (24), 24 states have call predecessors, (24), 14 states have call successors, (24) [2025-03-03 09:45:04,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:45:04,535 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2025-03-03 09:45:04,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-03-03 09:45:04,536 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 42 states have internal predecessors, (82), 14 states have call successors, (14), 1 states have call predecessors, (14), 24 states have return successors, (24), 24 states have call predecessors, (24), 14 states have call successors, (24) Word has length 77 [2025-03-03 09:45:04,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:45:04,536 INFO L225 Difference]: With dead ends: 58 [2025-03-03 09:45:04,536 INFO L226 Difference]: Without dead ends: 52 [2025-03-03 09:45:04,538 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=691, Invalid=7681, Unknown=0, NotChecked=0, Total=8372 [2025-03-03 09:45:04,538 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 318 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-03 09:45:04,539 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 586 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-03 09:45:04,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2025-03-03 09:45:04,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2025-03-03 09:45:04,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 36 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2025-03-03 09:45:04,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2025-03-03 09:45:04,544 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 77 [2025-03-03 09:45:04,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:45:04,544 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2025-03-03 09:45:04,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 42 states have internal predecessors, (82), 14 states have call successors, (14), 1 states have call predecessors, (14), 24 states have return successors, (24), 24 states have call predecessors, (24), 14 states have call successors, (24) [2025-03-03 09:45:04,544 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2025-03-03 09:45:04,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2025-03-03 09:45:04,545 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:45:04,545 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:45:04,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-03 09:45:04,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:45:04,745 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:45:04,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:45:04,745 INFO L85 PathProgramCache]: Analyzing trace with hash -2046381481, now seen corresponding path program 7 times [2025-03-03 09:45:04,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-03 09:45:04,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1435878993] [2025-03-03 09:45:04,746 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:45:04,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:45:04,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:45:04,747 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) [2025-03-03 09:45:04,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-03 09:45:04,779 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 89 statements into 1 equivalence classes. [2025-03-03 09:45:04,793 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 89 of 89 statements. [2025-03-03 09:45:04,793 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:45:04,793 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:45:04,794 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 60 conjuncts are in the unsatisfiable core [2025-03-03 09:45:04,796 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:45:05,284 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2025-03-03 09:45:05,284 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:45:09,764 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2025-03-03 09:45:09,764 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-03 09:45:09,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435878993] [2025-03-03 09:45:09,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435878993] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:45:09,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 09:45:09,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 45] total 76 [2025-03-03 09:45:09,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078165256] [2025-03-03 09:45:09,765 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 09:45:09,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2025-03-03 09:45:09,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-03 09:45:09,766 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2025-03-03 09:45:09,766 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=5429, Unknown=0, NotChecked=0, Total=5700 [2025-03-03 09:45:09,767 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 76 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 48 states have internal predecessors, (94), 16 states have call successors, (16), 1 states have call predecessors, (16), 28 states have return successors, (28), 28 states have call predecessors, (28), 16 states have call successors, (28) [2025-03-03 09:45:11,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:45:11,563 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2025-03-03 09:45:11,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-03-03 09:45:11,564 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 48 states have internal predecessors, (94), 16 states have call successors, (16), 1 states have call predecessors, (16), 28 states have return successors, (28), 28 states have call predecessors, (28), 16 states have call successors, (28) Word has length 89 [2025-03-03 09:45:11,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:45:11,565 INFO L225 Difference]: With dead ends: 64 [2025-03-03 09:45:11,565 INFO L226 Difference]: Without dead ends: 58 [2025-03-03 09:45:11,567 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=861, Invalid=10269, Unknown=0, NotChecked=0, Total=11130 [2025-03-03 09:45:11,567 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 172 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 1537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-03 09:45:11,567 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 732 Invalid, 1537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1461 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-03 09:45:11,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-03-03 09:45:11,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2025-03-03 09:45:11,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 40 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2025-03-03 09:45:11,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2025-03-03 09:45:11,572 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 89 [2025-03-03 09:45:11,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:45:11,573 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2025-03-03 09:45:11,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 48 states have internal predecessors, (94), 16 states have call successors, (16), 1 states have call predecessors, (16), 28 states have return successors, (28), 28 states have call predecessors, (28), 16 states have call successors, (28) [2025-03-03 09:45:11,573 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2025-03-03 09:45:11,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2025-03-03 09:45:11,574 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:45:11,574 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:45:11,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-03 09:45:11,775 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 [2025-03-03 09:45:11,776 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:45:11,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:45:11,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1870363255, now seen corresponding path program 8 times [2025-03-03 09:45:11,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-03 09:45:11,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942501036] [2025-03-03 09:45:11,776 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:45:11,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:45:11,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:45:11,778 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) [2025-03-03 09:45:11,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-03 09:45:11,817 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 101 statements into 2 equivalence classes. [2025-03-03 09:45:11,832 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 101 of 101 statements. [2025-03-03 09:45:11,832 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:45:11,832 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:45:11,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 68 conjuncts are in the unsatisfiable core [2025-03-03 09:45:11,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:45:12,404 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2025-03-03 09:45:12,404 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:45:17,945 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2025-03-03 09:45:17,946 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-03 09:45:17,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942501036] [2025-03-03 09:45:17,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942501036] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:45:17,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 09:45:17,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 51] total 86 [2025-03-03 09:45:17,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747500900] [2025-03-03 09:45:17,946 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 09:45:17,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2025-03-03 09:45:17,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-03 09:45:17,947 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2025-03-03 09:45:17,948 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=7001, Unknown=0, NotChecked=0, Total=7310 [2025-03-03 09:45:17,948 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 86 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 54 states have internal predecessors, (106), 18 states have call successors, (18), 1 states have call predecessors, (18), 32 states have return successors, (32), 32 states have call predecessors, (32), 18 states have call successors, (32) [2025-03-03 09:45:20,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:45:20,265 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2025-03-03 09:45:20,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-03-03 09:45:20,266 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 54 states have internal predecessors, (106), 18 states have call successors, (18), 1 states have call predecessors, (18), 32 states have return successors, (32), 32 states have call predecessors, (32), 18 states have call successors, (32) Word has length 101 [2025-03-03 09:45:20,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:45:20,267 INFO L225 Difference]: With dead ends: 70 [2025-03-03 09:45:20,267 INFO L226 Difference]: Without dead ends: 64 [2025-03-03 09:45:20,269 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1047, Invalid=13233, Unknown=0, NotChecked=0, Total=14280 [2025-03-03 09:45:20,269 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 358 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 1801 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 1973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:45:20,269 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 919 Invalid, 1973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1801 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2025-03-03 09:45:20,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-03-03 09:45:20,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2025-03-03 09:45:20,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 44 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2025-03-03 09:45:20,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2025-03-03 09:45:20,274 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 101 [2025-03-03 09:45:20,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:45:20,274 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2025-03-03 09:45:20,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 54 states have internal predecessors, (106), 18 states have call successors, (18), 1 states have call predecessors, (18), 32 states have return successors, (32), 32 states have call predecessors, (32), 18 states have call successors, (32) [2025-03-03 09:45:20,274 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2025-03-03 09:45:20,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2025-03-03 09:45:20,275 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:45:20,275 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:45:20,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-03 09:45:20,475 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 [2025-03-03 09:45:20,476 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:45:20,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:45:20,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1404482921, now seen corresponding path program 9 times [2025-03-03 09:45:20,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-03 09:45:20,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1670501242] [2025-03-03 09:45:20,476 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:45:20,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:45:20,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:45:20,478 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) [2025-03-03 09:45:20,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-03 09:45:20,533 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 113 statements into 18 equivalence classes. [2025-03-03 09:45:20,571 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) and asserted 113 of 113 statements. [2025-03-03 09:45:20,571 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2025-03-03 09:45:20,571 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:45:20,573 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 76 conjuncts are in the unsatisfiable core [2025-03-03 09:45:20,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:45:21,271 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2025-03-03 09:45:21,271 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:45:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2025-03-03 09:45:28,370 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-03 09:45:28,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670501242] [2025-03-03 09:45:28,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670501242] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:45:28,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 09:45:28,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 57] total 96 [2025-03-03 09:45:28,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396567222] [2025-03-03 09:45:28,370 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 09:45:28,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2025-03-03 09:45:28,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-03 09:45:28,371 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2025-03-03 09:45:28,371 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=8773, Unknown=0, NotChecked=0, Total=9120 [2025-03-03 09:45:28,372 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 96 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 60 states have internal predecessors, (118), 20 states have call successors, (20), 1 states have call predecessors, (20), 36 states have return successors, (36), 36 states have call predecessors, (36), 20 states have call successors, (36) [2025-03-03 09:45:31,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:45:31,043 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2025-03-03 09:45:31,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2025-03-03 09:45:31,044 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 60 states have internal predecessors, (118), 20 states have call successors, (20), 1 states have call predecessors, (20), 36 states have return successors, (36), 36 states have call predecessors, (36), 20 states have call successors, (36) Word has length 113 [2025-03-03 09:45:31,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:45:31,046 INFO L225 Difference]: With dead ends: 76 [2025-03-03 09:45:31,046 INFO L226 Difference]: Without dead ends: 70 [2025-03-03 09:45:31,047 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2337 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1249, Invalid=16573, Unknown=0, NotChecked=0, Total=17822 [2025-03-03 09:45:31,047 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 402 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 2169 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 2361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 2169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:45:31,047 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 1122 Invalid, 2361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 2169 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-03-03 09:45:31,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2025-03-03 09:45:31,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2025-03-03 09:45:31,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 48 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (21), 20 states have call predecessors, (21), 2 states have call successors, (21) [2025-03-03 09:45:31,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2025-03-03 09:45:31,057 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 113 [2025-03-03 09:45:31,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:45:31,057 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2025-03-03 09:45:31,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 60 states have internal predecessors, (118), 20 states have call successors, (20), 1 states have call predecessors, (20), 36 states have return successors, (36), 36 states have call predecessors, (36), 20 states have call successors, (36) [2025-03-03 09:45:31,057 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2025-03-03 09:45:31,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2025-03-03 09:45:31,059 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:45:31,059 INFO L218 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:45:31,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-03 09:45:31,259 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 [2025-03-03 09:45:31,260 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:45:31,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:45:31,260 INFO L85 PathProgramCache]: Analyzing trace with hash -115727689, now seen corresponding path program 10 times [2025-03-03 09:45:31,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-03 09:45:31,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609847088] [2025-03-03 09:45:31,260 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:45:31,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:45:31,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:45:31,262 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:45:31,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-03 09:45:31,316 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 125 statements into 2 equivalence classes. [2025-03-03 09:45:31,333 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 124 of 125 statements. [2025-03-03 09:45:31,333 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 09:45:31,333 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:45:31,335 WARN L254 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 84 conjuncts are in the unsatisfiable core [2025-03-03 09:45:31,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:45:32,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2025-03-03 09:45:32,169 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:45:40,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2025-03-03 09:45:40,897 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-03 09:45:40,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609847088] [2025-03-03 09:45:40,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609847088] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:45:40,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 09:45:40,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 63] total 106 [2025-03-03 09:45:40,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930228729] [2025-03-03 09:45:40,897 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 09:45:40,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2025-03-03 09:45:40,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-03 09:45:40,898 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2025-03-03 09:45:40,899 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=10745, Unknown=0, NotChecked=0, Total=11130 [2025-03-03 09:45:40,899 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 106 states, 105 states have (on average 1.2380952380952381) internal successors, (130), 66 states have internal predecessors, (130), 22 states have call successors, (22), 1 states have call predecessors, (22), 40 states have return successors, (40), 40 states have call predecessors, (40), 22 states have call successors, (40) [2025-03-03 09:45:44,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:45:44,225 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2025-03-03 09:45:44,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2025-03-03 09:45:44,226 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 105 states have (on average 1.2380952380952381) internal successors, (130), 66 states have internal predecessors, (130), 22 states have call successors, (22), 1 states have call predecessors, (22), 40 states have return successors, (40), 40 states have call predecessors, (40), 22 states have call successors, (40) Word has length 125 [2025-03-03 09:45:44,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:45:44,226 INFO L225 Difference]: With dead ends: 82 [2025-03-03 09:45:44,226 INFO L226 Difference]: Without dead ends: 76 [2025-03-03 09:45:44,228 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2856 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=1467, Invalid=20289, Unknown=0, NotChecked=0, Total=21756 [2025-03-03 09:45:44,228 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 806 mSDsluCounter, 1423 mSDsCounter, 0 mSdLazyCounter, 2688 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 1450 SdHoareTripleChecker+Invalid, 3089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 2688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2025-03-03 09:45:44,228 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [830 Valid, 1450 Invalid, 3089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 2688 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2025-03-03 09:45:44,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2025-03-03 09:45:44,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2025-03-03 09:45:44,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 52 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (23), 22 states have call predecessors, (23), 2 states have call successors, (23) [2025-03-03 09:45:44,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2025-03-03 09:45:44,233 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 125 [2025-03-03 09:45:44,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:45:44,233 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2025-03-03 09:45:44,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 105 states have (on average 1.2380952380952381) internal successors, (130), 66 states have internal predecessors, (130), 22 states have call successors, (22), 1 states have call predecessors, (22), 40 states have return successors, (40), 40 states have call predecessors, (40), 22 states have call successors, (40) [2025-03-03 09:45:44,234 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2025-03-03 09:45:44,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2025-03-03 09:45:44,234 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:45:44,234 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:45:44,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-03 09:45:44,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:45:44,435 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:45:44,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:45:44,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1827142953, now seen corresponding path program 11 times [2025-03-03 09:45:44,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-03 09:45:44,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [524128269] [2025-03-03 09:45:44,435 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:45:44,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:45:44,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:45:44,437 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:45:44,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-03 09:45:44,510 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 137 statements into 22 equivalence classes. [2025-03-03 09:45:44,554 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) and asserted 137 of 137 statements. [2025-03-03 09:45:44,554 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2025-03-03 09:45:44,554 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:45:44,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 92 conjuncts are in the unsatisfiable core [2025-03-03 09:45:44,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:45:45,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2025-03-03 09:45:45,516 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:45:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2025-03-03 09:45:55,916 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-03 09:45:55,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524128269] [2025-03-03 09:45:55,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524128269] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:45:55,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 09:45:55,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 69] total 116 [2025-03-03 09:45:55,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671971543] [2025-03-03 09:45:55,917 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 09:45:55,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2025-03-03 09:45:55,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-03 09:45:55,918 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2025-03-03 09:45:55,918 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=12917, Unknown=0, NotChecked=0, Total=13340 [2025-03-03 09:45:55,919 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 116 states, 115 states have (on average 1.2347826086956522) internal successors, (142), 72 states have internal predecessors, (142), 24 states have call successors, (24), 1 states have call predecessors, (24), 44 states have return successors, (44), 44 states have call predecessors, (44), 24 states have call successors, (44) [2025-03-03 09:45:59,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:45:59,779 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2025-03-03 09:45:59,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2025-03-03 09:45:59,780 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 115 states have (on average 1.2347826086956522) internal successors, (142), 72 states have internal predecessors, (142), 24 states have call successors, (24), 1 states have call predecessors, (24), 44 states have return successors, (44), 44 states have call predecessors, (44), 24 states have call successors, (44) Word has length 137 [2025-03-03 09:45:59,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:45:59,780 INFO L225 Difference]: With dead ends: 88 [2025-03-03 09:45:59,780 INFO L226 Difference]: Without dead ends: 82 [2025-03-03 09:45:59,782 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3427 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1701, Invalid=24381, Unknown=0, NotChecked=0, Total=26082 [2025-03-03 09:45:59,782 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 268 mSDsluCounter, 1681 mSDsCounter, 0 mSdLazyCounter, 3168 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 1710 SdHoareTripleChecker+Invalid, 3284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 3168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2025-03-03 09:45:59,782 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 1710 Invalid, 3284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 3168 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2025-03-03 09:45:59,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-03-03 09:45:59,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2025-03-03 09:45:59,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 55 states have (on average 1.018181818181818) internal successors, (56), 56 states have internal predecessors, (56), 2 states have call successors, (2), 1 states have call predecessors, (2), 24 states have return successors, (25), 24 states have call predecessors, (25), 2 states have call successors, (25) [2025-03-03 09:45:59,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2025-03-03 09:45:59,789 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 137 [2025-03-03 09:45:59,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:45:59,789 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2025-03-03 09:45:59,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 115 states have (on average 1.2347826086956522) internal successors, (142), 72 states have internal predecessors, (142), 24 states have call successors, (24), 1 states have call predecessors, (24), 44 states have return successors, (44), 44 states have call predecessors, (44), 24 states have call successors, (44) [2025-03-03 09:45:59,789 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2025-03-03 09:45:59,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2025-03-03 09:45:59,791 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:45:59,791 INFO L218 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:45:59,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-03 09:45:59,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:45:59,992 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:45:59,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:45:59,992 INFO L85 PathProgramCache]: Analyzing trace with hash -672339209, now seen corresponding path program 12 times [2025-03-03 09:45:59,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-03 09:45:59,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1020692992] [2025-03-03 09:45:59,992 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:45:59,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:45:59,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:45:59,994 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:45:59,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-03 09:46:00,081 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 149 statements into 24 equivalence classes. [2025-03-03 09:46:00,133 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) and asserted 149 of 149 statements. [2025-03-03 09:46:00,133 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2025-03-03 09:46:00,133 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:46:00,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 100 conjuncts are in the unsatisfiable core [2025-03-03 09:46:00,138 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:46:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2025-03-03 09:46:01,219 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:46:13,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2025-03-03 09:46:13,238 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-03 09:46:13,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020692992] [2025-03-03 09:46:13,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020692992] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:46:13,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 09:46:13,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 75] total 126 [2025-03-03 09:46:13,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686411029] [2025-03-03 09:46:13,238 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 09:46:13,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2025-03-03 09:46:13,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-03 09:46:13,240 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2025-03-03 09:46:13,240 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=15289, Unknown=0, NotChecked=0, Total=15750 [2025-03-03 09:46:13,240 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 126 states, 125 states have (on average 1.232) internal successors, (154), 78 states have internal predecessors, (154), 26 states have call successors, (26), 1 states have call predecessors, (26), 48 states have return successors, (48), 48 states have call predecessors, (48), 26 states have call successors, (48) [2025-03-03 09:46:17,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:46:17,725 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2025-03-03 09:46:17,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2025-03-03 09:46:17,726 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 125 states have (on average 1.232) internal successors, (154), 78 states have internal predecessors, (154), 26 states have call successors, (26), 1 states have call predecessors, (26), 48 states have return successors, (48), 48 states have call predecessors, (48), 26 states have call successors, (48) Word has length 149 [2025-03-03 09:46:17,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:46:17,727 INFO L225 Difference]: With dead ends: 94 [2025-03-03 09:46:17,727 INFO L226 Difference]: Without dead ends: 88 [2025-03-03 09:46:17,728 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4050 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=1951, Invalid=28849, Unknown=0, NotChecked=0, Total=30800 [2025-03-03 09:46:17,729 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 534 mSDsluCounter, 1773 mSDsCounter, 0 mSdLazyCounter, 3785 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1804 SdHoareTripleChecker+Invalid, 4037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 3785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2025-03-03 09:46:17,729 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 1804 Invalid, 4037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 3785 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2025-03-03 09:46:17,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2025-03-03 09:46:17,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2025-03-03 09:46:17,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 60 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (27), 26 states have call predecessors, (27), 2 states have call successors, (27) [2025-03-03 09:46:17,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2025-03-03 09:46:17,734 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 149 [2025-03-03 09:46:17,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:46:17,734 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2025-03-03 09:46:17,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 125 states have (on average 1.232) internal successors, (154), 78 states have internal predecessors, (154), 26 states have call successors, (26), 1 states have call predecessors, (26), 48 states have return successors, (48), 48 states have call predecessors, (48), 26 states have call successors, (48) [2025-03-03 09:46:17,735 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2025-03-03 09:46:17,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2025-03-03 09:46:17,735 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:46:17,735 INFO L218 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:46:17,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-03 09:46:17,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:46:17,936 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:46:17,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:46:17,936 INFO L85 PathProgramCache]: Analyzing trace with hash -440214761, now seen corresponding path program 13 times [2025-03-03 09:46:17,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-03 09:46:17,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1286867762] [2025-03-03 09:46:17,937 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:46:17,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:46:17,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:46:17,938 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:46:17,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-03 09:46:18,048 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 161 statements into 1 equivalence classes. [2025-03-03 09:46:18,070 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 161 of 161 statements. [2025-03-03 09:46:18,070 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:46:18,070 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:46:18,072 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 108 conjuncts are in the unsatisfiable core [2025-03-03 09:46:18,074 INFO L279 TraceCheckSpWp]: Computing forward predicates...