./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/MultCommutative-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive/MultCommutative-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 18:51:06,776 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 18:51:06,826 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 18:51:06,830 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 18:51:06,830 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 18:51:06,849 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 18:51:06,849 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 18:51:06,849 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 18:51:06,850 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 18:51:06,850 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 18:51:06,850 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 18:51:06,851 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 18:51:06,851 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 18:51:06,851 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 18:51:06,851 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 18:51:06,851 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 18:51:06,851 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 18:51:06,851 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 18:51:06,851 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 18:51:06,851 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 18:51:06,851 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 18:51:06,851 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 18:51:06,851 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 18:51:06,851 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 18:51:06,851 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 18:51:06,851 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 18:51:06,851 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 18:51:06,852 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 18:51:06,852 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 18:51:06,852 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 18:51:06,852 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 18:51:06,852 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 18:51:06,852 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 18:51:06,852 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 18:51:06,852 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 18:51:06,852 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 18:51:06,852 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 18:51:06,852 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 18:51:06,852 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 18:51:06,852 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 18:51:06,852 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 18:51:06,852 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 18:51:06,852 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 18:51:06,852 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 -> ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd [2025-03-16 18:51:07,072 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 18:51:07,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 18:51:07,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 18:51:07,084 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 18:51:07,085 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 18:51:07,085 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/MultCommutative-2.c [2025-03-16 18:51:08,198 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e25c689a0/f9e12e2eb42e42d49e36ad751b2b51b1/FLAG7ac4d57e8 [2025-03-16 18:51:08,365 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 18:51:08,366 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/MultCommutative-2.c [2025-03-16 18:51:08,371 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e25c689a0/f9e12e2eb42e42d49e36ad751b2b51b1/FLAG7ac4d57e8 [2025-03-16 18:51:08,393 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e25c689a0/f9e12e2eb42e42d49e36ad751b2b51b1 [2025-03-16 18:51:08,404 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 18:51:08,414 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 18:51:08,415 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 18:51:08,416 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 18:51:08,419 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 18:51:08,426 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 06:51:08" (1/1) ... [2025-03-16 18:51:08,427 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bf97972 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:51:08, skipping insertion in model container [2025-03-16 18:51:08,427 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 06:51:08" (1/1) ... [2025-03-16 18:51:08,441 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 18:51:08,544 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/MultCommutative-2.c[970,983] [2025-03-16 18:51:08,547 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 18:51:08,553 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 18:51:08,562 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/MultCommutative-2.c[970,983] [2025-03-16 18:51:08,565 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 18:51:08,574 INFO L204 MainTranslator]: Completed translation [2025-03-16 18:51:08,574 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:51:08 WrapperNode [2025-03-16 18:51:08,574 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 18:51:08,575 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 18:51:08,575 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 18:51:08,575 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 18:51:08,579 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:51:08" (1/1) ... [2025-03-16 18:51:08,584 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:51:08" (1/1) ... [2025-03-16 18:51:08,593 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 37 [2025-03-16 18:51:08,594 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 18:51:08,595 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 18:51:08,595 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 18:51:08,595 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 18:51:08,600 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:51:08" (1/1) ... [2025-03-16 18:51:08,601 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:51:08" (1/1) ... [2025-03-16 18:51:08,601 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:51:08" (1/1) ... [2025-03-16 18:51:08,611 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]. [2025-03-16 18:51:08,612 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:51:08" (1/1) ... [2025-03-16 18:51:08,612 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:51:08" (1/1) ... [2025-03-16 18:51:08,614 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:51:08" (1/1) ... [2025-03-16 18:51:08,617 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:51:08" (1/1) ... [2025-03-16 18:51:08,618 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:51:08" (1/1) ... [2025-03-16 18:51:08,618 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:51:08" (1/1) ... [2025-03-16 18:51:08,619 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 18:51:08,620 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 18:51:08,621 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 18:51:08,621 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 18:51:08,622 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:51:08" (1/1) ... [2025-03-16 18:51:08,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 18:51:08,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:51:08,643 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) [2025-03-16 18:51:08,645 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 [2025-03-16 18:51:08,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 18:51:08,660 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2025-03-16 18:51:08,660 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2025-03-16 18:51:08,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 18:51:08,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 18:51:08,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 18:51:08,699 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 18:51:08,700 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 18:51:08,760 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L24: havoc #t~ret5; [2025-03-16 18:51:08,761 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L19: havoc #t~ret4; [2025-03-16 18:51:08,829 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2025-03-16 18:51:08,830 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 18:51:08,839 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 18:51:08,839 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 18:51:08,840 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:51:08 BoogieIcfgContainer [2025-03-16 18:51:08,840 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 18:51:08,842 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 18:51:08,842 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 18:51:08,845 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 18:51:08,845 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 06:51:08" (1/3) ... [2025-03-16 18:51:08,845 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ffcdd26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 06:51:08, skipping insertion in model container [2025-03-16 18:51:08,845 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:51:08" (2/3) ... [2025-03-16 18:51:08,846 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ffcdd26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 06:51:08, skipping insertion in model container [2025-03-16 18:51:08,846 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:51:08" (3/3) ... [2025-03-16 18:51:08,846 INFO L128 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2025-03-16 18:51:08,859 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 18:51:08,861 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG MultCommutative-2.c that has 2 procedures, 22 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-16 18:51:08,902 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 18:51:08,913 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;@26f1ab1b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 18:51:08,913 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 18:51:08,916 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-16 18:51:08,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-16 18:51:08,920 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:51:08,921 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:51:08,921 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:51:08,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:51:08,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1948203827, now seen corresponding path program 1 times [2025-03-16 18:51:08,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:51:08,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664650400] [2025-03-16 18:51:08,930 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:51:08,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:51:08,984 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-16 18:51:09,006 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-16 18:51:09,007 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:51:09,007 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:51:09,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 18:51:09,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:51:09,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664650400] [2025-03-16 18:51:09,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664650400] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:51:09,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:51:09,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-16 18:51:09,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156863174] [2025-03-16 18:51:09,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:51:09,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-16 18:51:09,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:51:09,198 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-16 18:51:09,199 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-16 18:51:09,200 INFO L87 Difference]: Start difference. First operand has 22 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2025-03-16 18:51:09,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:51:09,272 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2025-03-16 18:51:09,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-16 18:51:09,274 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) Word has length 19 [2025-03-16 18:51:09,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:51:09,279 INFO L225 Difference]: With dead ends: 35 [2025-03-16 18:51:09,279 INFO L226 Difference]: Without dead ends: 25 [2025-03-16 18:51:09,281 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-03-16 18:51:09,283 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 2 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:51:09,286 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 132 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:51:09,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-03-16 18:51:09,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2025-03-16 18:51:09,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2025-03-16 18:51:09,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2025-03-16 18:51:09,310 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 19 [2025-03-16 18:51:09,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:51:09,310 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2025-03-16 18:51:09,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2025-03-16 18:51:09,311 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2025-03-16 18:51:09,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-16 18:51:09,313 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:51:09,313 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:51:09,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 18:51:09,314 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:51:09,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:51:09,315 INFO L85 PathProgramCache]: Analyzing trace with hash 804926089, now seen corresponding path program 1 times [2025-03-16 18:51:09,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:51:09,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461658095] [2025-03-16 18:51:09,316 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:51:09,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:51:09,326 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-16 18:51:09,334 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-16 18:51:09,337 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:51:09,337 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:51:09,475 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-16 18:51:09,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:51:09,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461658095] [2025-03-16 18:51:09,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461658095] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:51:09,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:51:09,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-16 18:51:09,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838745631] [2025-03-16 18:51:09,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:51:09,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-16 18:51:09,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:51:09,476 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-16 18:51:09,476 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-03-16 18:51:09,477 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 18:51:09,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:51:09,535 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2025-03-16 18:51:09,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 18:51:09,536 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2025-03-16 18:51:09,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:51:09,537 INFO L225 Difference]: With dead ends: 34 [2025-03-16 18:51:09,538 INFO L226 Difference]: Without dead ends: 30 [2025-03-16 18:51:09,538 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-03-16 18:51:09,538 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:51:09,539 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 134 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:51:09,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-03-16 18:51:09,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2025-03-16 18:51:09,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2025-03-16 18:51:09,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2025-03-16 18:51:09,544 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 25 [2025-03-16 18:51:09,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:51:09,544 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2025-03-16 18:51:09,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 18:51:09,544 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2025-03-16 18:51:09,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-16 18:51:09,545 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:51:09,545 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:51:09,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-16 18:51:09,545 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:51:09,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:51:09,546 INFO L85 PathProgramCache]: Analyzing trace with hash -666692207, now seen corresponding path program 1 times [2025-03-16 18:51:09,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:51:09,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566690979] [2025-03-16 18:51:09,546 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:51:09,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:51:09,554 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-16 18:51:09,564 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-16 18:51:09,568 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:51:09,569 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:51:09,640 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-16 18:51:09,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:51:09,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566690979] [2025-03-16 18:51:09,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566690979] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:51:09,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078623372] [2025-03-16 18:51:09,641 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:51:09,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:51:09,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:51:09,643 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) [2025-03-16 18:51:09,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 18:51:09,678 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-16 18:51:09,693 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-16 18:51:09,693 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:51:09,693 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:51:09,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-16 18:51:09,697 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:51:09,736 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-16 18:51:09,737 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:51:09,809 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-16 18:51:09,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078623372] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:51:09,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:51:09,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2025-03-16 18:51:09,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320094564] [2025-03-16 18:51:09,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:51:09,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 18:51:09,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:51:09,814 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 18:51:09,814 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:51:09,814 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 18:51:09,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:51:09,902 INFO L93 Difference]: Finished difference Result 34 states and 52 transitions. [2025-03-16 18:51:09,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 18:51:09,903 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2025-03-16 18:51:09,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:51:09,903 INFO L225 Difference]: With dead ends: 34 [2025-03-16 18:51:09,903 INFO L226 Difference]: Without dead ends: 26 [2025-03-16 18:51:09,904 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2025-03-16 18:51:09,904 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:51:09,904 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 36 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:51:09,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-03-16 18:51:09,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2025-03-16 18:51:09,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2025-03-16 18:51:09,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2025-03-16 18:51:09,912 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 26 [2025-03-16 18:51:09,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:51:09,912 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2025-03-16 18:51:09,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 18:51:09,913 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2025-03-16 18:51:09,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-16 18:51:09,914 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:51:09,914 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:51:09,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-16 18:51:10,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:51:10,115 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:51:10,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:51:10,115 INFO L85 PathProgramCache]: Analyzing trace with hash 144588269, now seen corresponding path program 2 times [2025-03-16 18:51:10,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:51:10,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679522919] [2025-03-16 18:51:10,116 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:51:10,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:51:10,120 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-16 18:51:10,126 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-16 18:51:10,129 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:51:10,129 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:51:10,184 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-16 18:51:10,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:51:10,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679522919] [2025-03-16 18:51:10,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679522919] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:51:10,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:51:10,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:51:10,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110485572] [2025-03-16 18:51:10,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:51:10,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:51:10,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:51:10,186 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:51:10,186 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:51:10,186 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 18:51:10,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:51:10,229 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2025-03-16 18:51:10,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:51:10,229 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2025-03-16 18:51:10,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:51:10,230 INFO L225 Difference]: With dead ends: 28 [2025-03-16 18:51:10,230 INFO L226 Difference]: Without dead ends: 24 [2025-03-16 18:51:10,230 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:51:10,231 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:51:10,231 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 42 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:51:10,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-03-16 18:51:10,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2025-03-16 18:51:10,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2025-03-16 18:51:10,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2025-03-16 18:51:10,235 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 26 [2025-03-16 18:51:10,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:51:10,236 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2025-03-16 18:51:10,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 18:51:10,236 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2025-03-16 18:51:10,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-16 18:51:10,237 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:51:10,237 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:51:10,238 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-16 18:51:10,238 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:51:10,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:51:10,238 INFO L85 PathProgramCache]: Analyzing trace with hash -691040681, now seen corresponding path program 1 times [2025-03-16 18:51:10,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:51:10,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870224508] [2025-03-16 18:51:10,238 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:51:10,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:51:10,243 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-16 18:51:10,253 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-16 18:51:10,256 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:51:10,256 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:51:10,332 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2025-03-16 18:51:10,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:51:10,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870224508] [2025-03-16 18:51:10,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870224508] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:51:10,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877838348] [2025-03-16 18:51:10,333 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:51:10,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:51:10,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:51:10,334 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) [2025-03-16 18:51:10,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 18:51:10,359 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-16 18:51:10,374 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-16 18:51:10,374 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:51:10,374 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:51:10,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-16 18:51:10,376 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:51:10,396 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2025-03-16 18:51:10,396 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:51:10,493 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2025-03-16 18:51:10,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877838348] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:51:10,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:51:10,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2025-03-16 18:51:10,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544900057] [2025-03-16 18:51:10,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:51:10,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-16 18:51:10,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:51:10,496 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-16 18:51:10,496 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2025-03-16 18:51:10,496 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) [2025-03-16 18:51:10,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:51:10,594 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2025-03-16 18:51:10,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 18:51:10,594 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) Word has length 45 [2025-03-16 18:51:10,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:51:10,597 INFO L225 Difference]: With dead ends: 46 [2025-03-16 18:51:10,598 INFO L226 Difference]: Without dead ends: 38 [2025-03-16 18:51:10,598 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2025-03-16 18:51:10,599 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:51:10,599 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 109 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:51:10,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-03-16 18:51:10,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2025-03-16 18:51:10,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 23 states have internal predecessors, (23), 4 states have call successors, (4), 1 states have call predecessors, (4), 6 states have return successors, (16), 7 states have call predecessors, (16), 4 states have call successors, (16) [2025-03-16 18:51:10,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2025-03-16 18:51:10,608 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 45 [2025-03-16 18:51:10,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:51:10,608 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2025-03-16 18:51:10,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) [2025-03-16 18:51:10,608 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2025-03-16 18:51:10,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-16 18:51:10,609 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:51:10,609 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:51:10,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-16 18:51:10,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:51:10,809 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:51:10,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:51:10,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1121480087, now seen corresponding path program 3 times [2025-03-16 18:51:10,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:51:10,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052128177] [2025-03-16 18:51:10,810 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 18:51:10,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:51:10,814 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 33 statements into 4 equivalence classes. [2025-03-16 18:51:10,820 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 18:51:10,820 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-16 18:51:10,820 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:51:11,210 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-03-16 18:51:11,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:51:11,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052128177] [2025-03-16 18:51:11,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052128177] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:51:11,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903245994] [2025-03-16 18:51:11,211 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 18:51:11,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:51:11,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:51:11,213 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) [2025-03-16 18:51:11,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 18:51:11,240 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 33 statements into 4 equivalence classes. [2025-03-16 18:51:11,255 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 18:51:11,255 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-16 18:51:11,255 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:51:11,256 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-03-16 18:51:11,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:51:11,519 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 18:51:11,521 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:51:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 18:51:12,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903245994] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:51:12,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:51:12,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 35 [2025-03-16 18:51:12,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872861894] [2025-03-16 18:51:12,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:51:12,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-03-16 18:51:12,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:51:12,174 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-03-16 18:51:12,175 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2025-03-16 18:51:12,175 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 35 states, 32 states have (on average 1.625) internal successors, (52), 25 states have internal predecessors, (52), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2025-03-16 18:51:12,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:51:12,589 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2025-03-16 18:51:12,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-16 18:51:12,589 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.625) internal successors, (52), 25 states have internal predecessors, (52), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) Word has length 33 [2025-03-16 18:51:12,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:51:12,590 INFO L225 Difference]: With dead ends: 46 [2025-03-16 18:51:12,590 INFO L226 Difference]: Without dead ends: 42 [2025-03-16 18:51:12,591 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=256, Invalid=1636, Unknown=0, NotChecked=0, Total=1892 [2025-03-16 18:51:12,591 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 61 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 18:51:12,592 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 147 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 18:51:12,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2025-03-16 18:51:12,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2025-03-16 18:51:12,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 26 states have internal predecessors, (26), 5 states have call successors, (5), 1 states have call predecessors, (5), 7 states have return successors, (21), 9 states have call predecessors, (21), 5 states have call successors, (21) [2025-03-16 18:51:12,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2025-03-16 18:51:12,598 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 33 [2025-03-16 18:51:12,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:51:12,598 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2025-03-16 18:51:12,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.625) internal successors, (52), 25 states have internal predecessors, (52), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2025-03-16 18:51:12,599 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2025-03-16 18:51:12,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-03-16 18:51:12,600 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:51:12,600 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:51:12,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-16 18:51:12,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:51:12,802 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:51:12,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:51:12,802 INFO L85 PathProgramCache]: Analyzing trace with hash 897287171, now seen corresponding path program 4 times [2025-03-16 18:51:12,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:51:12,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891923292] [2025-03-16 18:51:12,803 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 18:51:12,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:51:12,807 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 40 statements into 2 equivalence classes. [2025-03-16 18:51:12,817 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-03-16 18:51:12,817 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 18:51:12,817 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:51:13,217 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-16 18:51:13,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:51:13,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891923292] [2025-03-16 18:51:13,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891923292] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:51:13,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045871268] [2025-03-16 18:51:13,219 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 18:51:13,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:51:13,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:51:13,221 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) [2025-03-16 18:51:13,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 18:51:13,245 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 40 statements into 2 equivalence classes. [2025-03-16 18:51:13,259 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-03-16 18:51:13,260 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 18:51:13,260 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:51:13,261 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-03-16 18:51:13,262 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:51:13,471 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-03-16 18:51:13,471 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:51:13,994 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-03-16 18:51:13,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045871268] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:51:13,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:51:13,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 18] total 40 [2025-03-16 18:51:13,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997346777] [2025-03-16 18:51:13,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:51:13,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-03-16 18:51:13,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:51:13,995 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-03-16 18:51:13,996 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1418, Unknown=0, NotChecked=0, Total=1560 [2025-03-16 18:51:13,996 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand has 40 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 27 states have internal predecessors, (51), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (14), 13 states have call predecessors, (14), 9 states have call successors, (14) [2025-03-16 18:51:14,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:51:14,811 INFO L93 Difference]: Finished difference Result 76 states and 125 transitions. [2025-03-16 18:51:14,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-16 18:51:14,812 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 27 states have internal predecessors, (51), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (14), 13 states have call predecessors, (14), 9 states have call successors, (14) Word has length 40 [2025-03-16 18:51:14,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:51:14,814 INFO L225 Difference]: With dead ends: 76 [2025-03-16 18:51:14,817 INFO L226 Difference]: Without dead ends: 59 [2025-03-16 18:51:14,818 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=427, Invalid=3233, Unknown=0, NotChecked=0, Total=3660 [2025-03-16 18:51:14,819 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 44 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-16 18:51:14,819 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 213 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-16 18:51:14,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-03-16 18:51:14,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2025-03-16 18:51:14,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.09375) internal successors, (35), 34 states have internal predecessors, (35), 7 states have call successors, (7), 2 states have call predecessors, (7), 9 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) [2025-03-16 18:51:14,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 76 transitions. [2025-03-16 18:51:14,836 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 76 transitions. Word has length 40 [2025-03-16 18:51:14,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:51:14,836 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 76 transitions. [2025-03-16 18:51:14,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 27 states have internal predecessors, (51), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (14), 13 states have call predecessors, (14), 9 states have call successors, (14) [2025-03-16 18:51:14,836 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 76 transitions. [2025-03-16 18:51:14,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2025-03-16 18:51:14,837 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:51:14,837 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:51:14,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-16 18:51:15,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:51:15,038 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:51:15,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:51:15,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1197756241, now seen corresponding path program 2 times [2025-03-16 18:51:15,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:51:15,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148297488] [2025-03-16 18:51:15,039 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:51:15,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:51:15,042 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 60 statements into 2 equivalence classes. [2025-03-16 18:51:15,047 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 60 of 60 statements. [2025-03-16 18:51:15,047 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:51:15,047 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:51:15,088 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 7 proven. 40 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2025-03-16 18:51:15,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:51:15,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148297488] [2025-03-16 18:51:15,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148297488] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:51:15,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687854715] [2025-03-16 18:51:15,088 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:51:15,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:51:15,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:51:15,090 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) [2025-03-16 18:51:15,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 18:51:15,114 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 60 statements into 2 equivalence classes. [2025-03-16 18:51:15,131 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 60 of 60 statements. [2025-03-16 18:51:15,131 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:51:15,131 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:51:15,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-16 18:51:15,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:51:15,166 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2025-03-16 18:51:15,166 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:51:15,305 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2025-03-16 18:51:15,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687854715] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:51:15,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:51:15,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2025-03-16 18:51:15,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024411789] [2025-03-16 18:51:15,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:51:15,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-16 18:51:15,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:51:15,306 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-16 18:51:15,306 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-03-16 18:51:15,306 INFO L87 Difference]: Start difference. First operand 49 states and 76 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2025-03-16 18:51:15,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:51:15,388 INFO L93 Difference]: Finished difference Result 78 states and 123 transitions. [2025-03-16 18:51:15,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 18:51:15,389 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 60 [2025-03-16 18:51:15,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:51:15,390 INFO L225 Difference]: With dead ends: 78 [2025-03-16 18:51:15,391 INFO L226 Difference]: Without dead ends: 25 [2025-03-16 18:51:15,392 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2025-03-16 18:51:15,392 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 14 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:51:15,394 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 63 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:51:15,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-03-16 18:51:15,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2025-03-16 18:51:15,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 18 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2025-03-16 18:51:15,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2025-03-16 18:51:15,399 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 60 [2025-03-16 18:51:15,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:51:15,400 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2025-03-16 18:51:15,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2025-03-16 18:51:15,400 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2025-03-16 18:51:15,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-03-16 18:51:15,402 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:51:15,402 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:51:15,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-16 18:51:15,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:51:15,606 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:51:15,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:51:15,606 INFO L85 PathProgramCache]: Analyzing trace with hash 978677159, now seen corresponding path program 5 times [2025-03-16 18:51:15,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:51:15,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670630556] [2025-03-16 18:51:15,606 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 18:51:15,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:51:15,610 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 40 statements into 5 equivalence classes. [2025-03-16 18:51:15,622 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 40 of 40 statements. [2025-03-16 18:51:15,622 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-16 18:51:15,622 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:51:15,964 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-16 18:51:15,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:51:15,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670630556] [2025-03-16 18:51:15,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670630556] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:51:15,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084412609] [2025-03-16 18:51:15,965 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 18:51:15,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:51:15,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:51:15,967 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) [2025-03-16 18:51:15,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 18:51:15,996 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 40 statements into 5 equivalence classes. [2025-03-16 18:51:16,009 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 40 of 40 statements. [2025-03-16 18:51:16,009 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-16 18:51:16,010 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:51:16,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-03-16 18:51:16,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:51:16,266 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-03-16 18:51:16,267 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:51:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-16 18:51:16,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084412609] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:51:16,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:51:16,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 15] total 39 [2025-03-16 18:51:16,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969469054] [2025-03-16 18:51:16,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:51:16,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-03-16 18:51:16,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:51:16,775 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-03-16 18:51:16,776 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1347, Unknown=0, NotChecked=0, Total=1482 [2025-03-16 18:51:16,776 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 39 states, 35 states have (on average 1.4) internal successors, (49), 27 states have internal predecessors, (49), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (13), 12 states have call predecessors, (13), 8 states have call successors, (13) [2025-03-16 18:51:17,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:51:17,311 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2025-03-16 18:51:17,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-16 18:51:17,311 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 35 states have (on average 1.4) internal successors, (49), 27 states have internal predecessors, (49), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (13), 12 states have call predecessors, (13), 8 states have call successors, (13) Word has length 40 [2025-03-16 18:51:17,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:51:17,312 INFO L225 Difference]: With dead ends: 42 [2025-03-16 18:51:17,312 INFO L226 Difference]: Without dead ends: 34 [2025-03-16 18:51:17,313 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=387, Invalid=2805, Unknown=0, NotChecked=0, Total=3192 [2025-03-16 18:51:17,313 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 18:51:17,313 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 176 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 18:51:17,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-03-16 18:51:17,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2025-03-16 18:51:17,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2025-03-16 18:51:17,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2025-03-16 18:51:17,317 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 40 [2025-03-16 18:51:17,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:51:17,317 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2025-03-16 18:51:17,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 35 states have (on average 1.4) internal successors, (49), 27 states have internal predecessors, (49), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (13), 12 states have call predecessors, (13), 8 states have call successors, (13) [2025-03-16 18:51:17,317 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2025-03-16 18:51:17,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-03-16 18:51:17,320 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:51:17,320 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:51:17,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-16 18:51:17,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:51:17,524 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:51:17,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:51:17,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1880818923, now seen corresponding path program 6 times [2025-03-16 18:51:17,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:51:17,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743313984] [2025-03-16 18:51:17,524 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 18:51:17,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:51:17,528 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 61 statements into 9 equivalence classes. [2025-03-16 18:51:17,541 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 61 of 61 statements. [2025-03-16 18:51:17,541 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-03-16 18:51:17,541 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:51:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 9 proven. 125 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-16 18:51:18,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:51:18,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743313984] [2025-03-16 18:51:18,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743313984] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:51:18,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586542255] [2025-03-16 18:51:18,213 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 18:51:18,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:51:18,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:51:18,215 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:51:18,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-16 18:51:18,237 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 61 statements into 9 equivalence classes. [2025-03-16 18:51:18,253 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 61 of 61 statements. [2025-03-16 18:51:18,254 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-03-16 18:51:18,254 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:51:18,256 WARN L254 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 97 conjuncts are in the unsatisfiable core [2025-03-16 18:51:18,257 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:51:18,535 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 3 proven. 81 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2025-03-16 18:51:18,535 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:51:19,269 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 14 proven. 112 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2025-03-16 18:51:19,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586542255] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:51:19,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:51:19,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 16, 21] total 46 [2025-03-16 18:51:19,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585693885] [2025-03-16 18:51:19,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:51:19,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2025-03-16 18:51:19,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:51:19,271 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2025-03-16 18:51:19,271 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1907, Unknown=0, NotChecked=0, Total=2070 [2025-03-16 18:51:19,271 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 46 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 32 states have internal predecessors, (65), 13 states have call successors, (13), 1 states have call predecessors, (13), 8 states have return successors, (19), 14 states have call predecessors, (19), 13 states have call successors, (19) [2025-03-16 18:51:19,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:51:19,711 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2025-03-16 18:51:19,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-16 18:51:19,712 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 32 states have internal predecessors, (65), 13 states have call successors, (13), 1 states have call predecessors, (13), 8 states have return successors, (19), 14 states have call predecessors, (19), 13 states have call successors, (19) Word has length 61 [2025-03-16 18:51:19,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:51:19,713 INFO L225 Difference]: With dead ends: 44 [2025-03-16 18:51:19,713 INFO L226 Difference]: Without dead ends: 34 [2025-03-16 18:51:19,714 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=393, Invalid=3389, Unknown=0, NotChecked=0, Total=3782 [2025-03-16 18:51:19,714 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 41 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 18:51:19,714 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 186 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 18:51:19,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-03-16 18:51:19,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2025-03-16 18:51:19,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2025-03-16 18:51:19,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2025-03-16 18:51:19,718 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 61 [2025-03-16 18:51:19,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:51:19,718 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2025-03-16 18:51:19,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 32 states have internal predecessors, (65), 13 states have call successors, (13), 1 states have call predecessors, (13), 8 states have return successors, (19), 14 states have call predecessors, (19), 13 states have call successors, (19) [2025-03-16 18:51:19,719 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2025-03-16 18:51:19,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2025-03-16 18:51:19,719 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:51:19,719 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:51:19,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-16 18:51:19,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:51:19,923 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:51:19,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:51:19,924 INFO L85 PathProgramCache]: Analyzing trace with hash 304349051, now seen corresponding path program 7 times [2025-03-16 18:51:19,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:51:19,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468907370] [2025-03-16 18:51:19,924 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 18:51:19,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:51:19,927 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 68 statements into 1 equivalence classes. [2025-03-16 18:51:19,933 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 68 of 68 statements. [2025-03-16 18:51:19,933 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:51:19,933 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:51:20,635 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-16 18:51:20,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:51:20,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468907370] [2025-03-16 18:51:20,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468907370] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:51:20,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20067987] [2025-03-16 18:51:20,635 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 18:51:20,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:51:20,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:51:20,637 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) [2025-03-16 18:51:20,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-16 18:51:20,664 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 68 statements into 1 equivalence classes. [2025-03-16 18:51:20,680 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 68 of 68 statements. [2025-03-16 18:51:20,680 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:51:20,680 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:51:20,682 WARN L254 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 109 conjuncts are in the unsatisfiable core [2025-03-16 18:51:20,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:51:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 5 proven. 108 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2025-03-16 18:51:21,262 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:51:22,528 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 26 proven. 156 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-16 18:51:22,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20067987] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:51:22,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:51:22,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 20, 30] total 71 [2025-03-16 18:51:22,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079812883] [2025-03-16 18:51:22,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:51:22,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2025-03-16 18:51:22,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:51:22,530 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2025-03-16 18:51:22,531 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=4727, Unknown=0, NotChecked=0, Total=4970 [2025-03-16 18:51:22,531 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 71 states, 66 states have (on average 1.5151515151515151) internal successors, (100), 47 states have internal predecessors, (100), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (25), 24 states have call predecessors, (25), 19 states have call successors, (25) [2025-03-16 18:51:23,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:51:23,812 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2025-03-16 18:51:23,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-03-16 18:51:23,813 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 66 states have (on average 1.5151515151515151) internal successors, (100), 47 states have internal predecessors, (100), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (25), 24 states have call predecessors, (25), 19 states have call successors, (25) Word has length 68 [2025-03-16 18:51:23,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:51:23,814 INFO L225 Difference]: With dead ends: 55 [2025-03-16 18:51:23,814 INFO L226 Difference]: Without dead ends: 45 [2025-03-16 18:51:23,817 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1964 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=837, Invalid=8865, Unknown=0, NotChecked=0, Total=9702 [2025-03-16 18:51:23,818 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 49 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 1793 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 1904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-16 18:51:23,818 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 538 Invalid, 1904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1793 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-16 18:51:23,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2025-03-16 18:51:23,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2025-03-16 18:51:23,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 5 states have call successors, (5), 2 states have call predecessors, (5), 7 states have return successors, (16), 9 states have call predecessors, (16), 5 states have call successors, (16) [2025-03-16 18:51:23,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2025-03-16 18:51:23,826 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 68 [2025-03-16 18:51:23,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:51:23,827 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2025-03-16 18:51:23,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 66 states have (on average 1.5151515151515151) internal successors, (100), 47 states have internal predecessors, (100), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (25), 24 states have call predecessors, (25), 19 states have call successors, (25) [2025-03-16 18:51:23,827 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2025-03-16 18:51:23,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2025-03-16 18:51:23,828 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:51:23,829 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:51:23,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-16 18:51:24,029 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,SelfDestructingSolverStorable10 [2025-03-16 18:51:24,029 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:51:24,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:51:24,030 INFO L85 PathProgramCache]: Analyzing trace with hash 932919583, now seen corresponding path program 8 times [2025-03-16 18:51:24,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:51:24,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371756192] [2025-03-16 18:51:24,030 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:51:24,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:51:24,033 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 75 statements into 2 equivalence classes. [2025-03-16 18:51:24,041 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 75 of 75 statements. [2025-03-16 18:51:24,041 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:51:24,041 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:51:24,593 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 156 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2025-03-16 18:51:24,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:51:24,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371756192] [2025-03-16 18:51:24,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371756192] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:51:24,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480848553] [2025-03-16 18:51:24,594 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:51:24,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:51:24,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:51:24,596 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) [2025-03-16 18:51:24,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-16 18:51:24,623 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 75 statements into 2 equivalence classes. [2025-03-16 18:51:24,641 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 75 of 75 statements. [2025-03-16 18:51:24,641 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:51:24,641 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:51:24,643 WARN L254 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 121 conjuncts are in the unsatisfiable core [2025-03-16 18:51:24,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:51:24,928 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 6 proven. 136 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2025-03-16 18:51:24,928 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:51:26,023 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 29 proven. 203 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2025-03-16 18:51:26,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480848553] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:51:26,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:51:26,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22, 33] total 55 [2025-03-16 18:51:26,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514715672] [2025-03-16 18:51:26,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:51:26,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2025-03-16 18:51:26,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:51:26,025 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2025-03-16 18:51:26,025 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=2735, Unknown=0, NotChecked=0, Total=2970 [2025-03-16 18:51:26,025 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 55 states, 51 states have (on average 1.5686274509803921) internal successors, (80), 36 states have internal predecessors, (80), 14 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (27), 19 states have call predecessors, (27), 14 states have call successors, (27) [2025-03-16 18:51:26,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:51:26,844 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2025-03-16 18:51:26,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-03-16 18:51:26,844 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 51 states have (on average 1.5686274509803921) internal successors, (80), 36 states have internal predecessors, (80), 14 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (27), 19 states have call predecessors, (27), 14 states have call successors, (27) Word has length 75 [2025-03-16 18:51:26,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:51:26,845 INFO L225 Difference]: With dead ends: 55 [2025-03-16 18:51:26,845 INFO L226 Difference]: Without dead ends: 48 [2025-03-16 18:51:26,846 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=709, Invalid=5771, Unknown=0, NotChecked=0, Total=6480 [2025-03-16 18:51:26,847 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 88 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-16 18:51:26,847 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 337 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1114 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-16 18:51:26,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2025-03-16 18:51:26,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2025-03-16 18:51:26,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 5 states have call successors, (5), 2 states have call predecessors, (5), 8 states have return successors, (18), 10 states have call predecessors, (18), 5 states have call successors, (18) [2025-03-16 18:51:26,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2025-03-16 18:51:26,852 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 75 [2025-03-16 18:51:26,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:51:26,853 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2025-03-16 18:51:26,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 51 states have (on average 1.5686274509803921) internal successors, (80), 36 states have internal predecessors, (80), 14 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (27), 19 states have call predecessors, (27), 14 states have call successors, (27) [2025-03-16 18:51:26,853 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2025-03-16 18:51:26,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2025-03-16 18:51:26,854 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:51:26,854 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:51:26,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-16 18:51:27,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:51:27,055 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:51:27,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:51:27,055 INFO L85 PathProgramCache]: Analyzing trace with hash -379230797, now seen corresponding path program 9 times [2025-03-16 18:51:27,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:51:27,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105371126] [2025-03-16 18:51:27,055 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 18:51:27,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:51:27,058 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 75 statements into 11 equivalence classes. [2025-03-16 18:51:27,067 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 75 of 75 statements. [2025-03-16 18:51:27,067 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-16 18:51:27,067 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:51:27,523 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 43 proven. 164 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2025-03-16 18:51:27,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:51:27,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105371126] [2025-03-16 18:51:27,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105371126] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:51:27,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978020980] [2025-03-16 18:51:27,523 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 18:51:27,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:51:27,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:51:27,525 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) [2025-03-16 18:51:27,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-16 18:51:27,555 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 75 statements into 11 equivalence classes. [2025-03-16 18:51:27,577 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 75 of 75 statements. [2025-03-16 18:51:27,577 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-16 18:51:27,577 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:51:27,579 WARN L254 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 121 conjuncts are in the unsatisfiable core [2025-03-16 18:51:27,581 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:51:27,896 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 9 proven. 128 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2025-03-16 18:51:27,896 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:51:28,744 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 18 proven. 197 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-03-16 18:51:28,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978020980] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:51:28,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:51:28,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 24] total 48 [2025-03-16 18:51:28,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104035136] [2025-03-16 18:51:28,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:51:28,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-03-16 18:51:28,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:51:28,745 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-03-16 18:51:28,745 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2092, Unknown=0, NotChecked=0, Total=2256 [2025-03-16 18:51:28,745 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 48 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 31 states have internal predecessors, (74), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (19), 17 states have call predecessors, (19), 13 states have call successors, (19) [2025-03-16 18:51:29,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:51:29,157 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2025-03-16 18:51:29,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-16 18:51:29,157 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 31 states have internal predecessors, (74), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (19), 17 states have call predecessors, (19), 13 states have call successors, (19) Word has length 75 [2025-03-16 18:51:29,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:51:29,157 INFO L225 Difference]: With dead ends: 53 [2025-03-16 18:51:29,157 INFO L226 Difference]: Without dead ends: 43 [2025-03-16 18:51:29,158 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=394, Invalid=3766, Unknown=0, NotChecked=0, Total=4160 [2025-03-16 18:51:29,159 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 48 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 18:51:29,159 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 267 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 18:51:29,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2025-03-16 18:51:29,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2025-03-16 18:51:29,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 5 states have call successors, (5), 2 states have call predecessors, (5), 8 states have return successors, (16), 10 states have call predecessors, (16), 5 states have call successors, (16) [2025-03-16 18:51:29,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2025-03-16 18:51:29,164 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 75 [2025-03-16 18:51:29,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:51:29,164 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2025-03-16 18:51:29,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 31 states have internal predecessors, (74), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (19), 17 states have call predecessors, (19), 13 states have call successors, (19) [2025-03-16 18:51:29,164 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2025-03-16 18:51:29,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2025-03-16 18:51:29,165 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:51:29,165 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:51:29,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-16 18:51:29,368 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,SelfDestructingSolverStorable12 [2025-03-16 18:51:29,368 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:51:29,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:51:29,368 INFO L85 PathProgramCache]: Analyzing trace with hash -263344411, now seen corresponding path program 10 times [2025-03-16 18:51:29,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:51:29,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346066] [2025-03-16 18:51:29,369 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 18:51:29,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:51:29,372 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 82 statements into 2 equivalence classes. [2025-03-16 18:51:29,379 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 82 of 82 statements. [2025-03-16 18:51:29,379 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 18:51:29,379 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:51:30,127 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 48 proven. 194 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-03-16 18:51:30,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:51:30,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346066] [2025-03-16 18:51:30,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346066] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:51:30,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440577524] [2025-03-16 18:51:30,128 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 18:51:30,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:51:30,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:51:30,129 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) [2025-03-16 18:51:30,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-16 18:51:30,159 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 82 statements into 2 equivalence classes. [2025-03-16 18:51:30,176 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 82 of 82 statements. [2025-03-16 18:51:30,176 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 18:51:30,176 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:51:30,178 WARN L254 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 133 conjuncts are in the unsatisfiable core [2025-03-16 18:51:30,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:51:30,708 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 7 proven. 167 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2025-03-16 18:51:30,708 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:51:32,299 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 256 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2025-03-16 18:51:32,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440577524] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:51:32,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:51:32,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 24, 36] total 74 [2025-03-16 18:51:32,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985082548] [2025-03-16 18:51:32,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:51:32,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2025-03-16 18:51:32,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:51:32,300 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2025-03-16 18:51:32,301 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=5125, Unknown=0, NotChecked=0, Total=5402 [2025-03-16 18:51:32,302 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 74 states, 70 states have (on average 1.4) internal successors, (98), 45 states have internal predecessors, (98), 15 states have call successors, (15), 1 states have call predecessors, (15), 20 states have return successors, (31), 29 states have call predecessors, (31), 15 states have call successors, (31) [2025-03-16 18:51:33,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:51:33,544 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2025-03-16 18:51:33,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-03-16 18:51:33,545 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 70 states have (on average 1.4) internal successors, (98), 45 states have internal predecessors, (98), 15 states have call successors, (15), 1 states have call predecessors, (15), 20 states have return successors, (31), 29 states have call predecessors, (31), 15 states have call successors, (31) Word has length 82 [2025-03-16 18:51:33,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:51:33,545 INFO L225 Difference]: With dead ends: 56 [2025-03-16 18:51:33,545 INFO L226 Difference]: Without dead ends: 49 [2025-03-16 18:51:33,547 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2312 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=803, Invalid=9297, Unknown=0, NotChecked=0, Total=10100 [2025-03-16 18:51:33,548 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 118 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 1895 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 2020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-16 18:51:33,548 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 600 Invalid, 2020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1895 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-16 18:51:33,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2025-03-16 18:51:33,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2025-03-16 18:51:33,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 9 states have return successors, (18), 11 states have call predecessors, (18), 5 states have call successors, (18) [2025-03-16 18:51:33,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2025-03-16 18:51:33,553 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 82 [2025-03-16 18:51:33,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:51:33,553 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2025-03-16 18:51:33,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 70 states have (on average 1.4) internal successors, (98), 45 states have internal predecessors, (98), 15 states have call successors, (15), 1 states have call predecessors, (15), 20 states have return successors, (31), 29 states have call predecessors, (31), 15 states have call successors, (31) [2025-03-16 18:51:33,553 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2025-03-16 18:51:33,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2025-03-16 18:51:33,554 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:51:33,554 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:51:33,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-16 18:51:33,754 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,SelfDestructingSolverStorable13 [2025-03-16 18:51:33,755 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:51:33,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:51:33,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1639012111, now seen corresponding path program 11 times [2025-03-16 18:51:33,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:51:33,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003978728] [2025-03-16 18:51:33,755 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 18:51:33,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:51:33,759 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 110 statements into 18 equivalence classes. [2025-03-16 18:51:33,770 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) and asserted 110 of 110 statements. [2025-03-16 18:51:33,770 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2025-03-16 18:51:33,770 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:51:35,002 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 109 proven. 383 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2025-03-16 18:51:35,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:51:35,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003978728] [2025-03-16 18:51:35,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003978728] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:51:35,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68360197] [2025-03-16 18:51:35,003 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 18:51:35,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:51:35,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:51:35,005 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) [2025-03-16 18:51:35,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-16 18:51:35,043 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 110 statements into 18 equivalence classes. [2025-03-16 18:51:35,072 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) and asserted 110 of 110 statements. [2025-03-16 18:51:35,072 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2025-03-16 18:51:35,072 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:51:35,074 WARN L254 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 181 conjuncts are in the unsatisfiable core [2025-03-16 18:51:35,076 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:51:35,979 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 8 proven. 316 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2025-03-16 18:51:35,980 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:51:38,789 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 53 proven. 520 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2025-03-16 18:51:38,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68360197] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:51:38,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:51:38,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 26, 48] total 102 [2025-03-16 18:51:38,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164347524] [2025-03-16 18:51:38,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:51:38,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2025-03-16 18:51:38,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:51:38,790 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2025-03-16 18:51:38,791 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=9885, Unknown=0, NotChecked=0, Total=10302 [2025-03-16 18:51:38,791 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 102 states, 97 states have (on average 1.4845360824742269) internal successors, (144), 63 states have internal predecessors, (144), 23 states have call successors, (23), 1 states have call predecessors, (23), 28 states have return successors, (40), 39 states have call predecessors, (40), 23 states have call successors, (40) [2025-03-16 18:51:40,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:51:40,604 INFO L93 Difference]: Finished difference Result 72 states and 98 transitions. [2025-03-16 18:51:40,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2025-03-16 18:51:40,604 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 97 states have (on average 1.4845360824742269) internal successors, (144), 63 states have internal predecessors, (144), 23 states have call successors, (23), 1 states have call predecessors, (23), 28 states have return successors, (40), 39 states have call predecessors, (40), 23 states have call successors, (40) Word has length 110 [2025-03-16 18:51:40,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:51:40,605 INFO L225 Difference]: With dead ends: 72 [2025-03-16 18:51:40,605 INFO L226 Difference]: Without dead ends: 58 [2025-03-16 18:51:40,606 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4303 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1494, Invalid=17412, Unknown=0, NotChecked=0, Total=18906 [2025-03-16 18:51:40,607 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 119 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 2986 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 3123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 2986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-03-16 18:51:40,607 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 708 Invalid, 3123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 2986 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-03-16 18:51:40,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-03-16 18:51:40,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2025-03-16 18:51:40,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 5 states have call successors, (5), 2 states have call predecessors, (5), 10 states have return successors, (20), 12 states have call predecessors, (20), 5 states have call successors, (20) [2025-03-16 18:51:40,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2025-03-16 18:51:40,612 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 110 [2025-03-16 18:51:40,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:51:40,612 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2025-03-16 18:51:40,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 97 states have (on average 1.4845360824742269) internal successors, (144), 63 states have internal predecessors, (144), 23 states have call successors, (23), 1 states have call predecessors, (23), 28 states have return successors, (40), 39 states have call predecessors, (40), 23 states have call successors, (40) [2025-03-16 18:51:40,613 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2025-03-16 18:51:40,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2025-03-16 18:51:40,616 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:51:40,616 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:51:40,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-16 18:51:40,816 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,SelfDestructingSolverStorable14 [2025-03-16 18:51:40,816 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:51:40,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:51:40,817 INFO L85 PathProgramCache]: Analyzing trace with hash 704957563, now seen corresponding path program 12 times [2025-03-16 18:51:40,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:51:40,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465890004] [2025-03-16 18:51:40,817 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 18:51:40,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:51:40,821 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 124 statements into 20 equivalence classes. [2025-03-16 18:51:40,841 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) and asserted 124 of 124 statements. [2025-03-16 18:51:40,841 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2025-03-16 18:51:40,841 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:51:42,428 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 98 proven. 647 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2025-03-16 18:51:42,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:51:42,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465890004] [2025-03-16 18:51:42,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465890004] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:51:42,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299643958] [2025-03-16 18:51:42,428 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 18:51:42,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:51:42,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:51:42,430 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) [2025-03-16 18:51:42,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-16 18:51:42,475 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 124 statements into 20 equivalence classes. [2025-03-16 18:51:42,506 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) and asserted 124 of 124 statements. [2025-03-16 18:51:42,506 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2025-03-16 18:51:42,506 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:51:42,509 WARN L254 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 205 conjuncts are in the unsatisfiable core [2025-03-16 18:51:42,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:51:43,465 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 9 proven. 408 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2025-03-16 18:51:43,465 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:51:47,181 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 62 proven. 688 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2025-03-16 18:51:47,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299643958] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:51:47,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:51:47,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 28, 54] total 116 [2025-03-16 18:51:47,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546580414] [2025-03-16 18:51:47,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:51:47,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2025-03-16 18:51:47,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:51:47,183 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2025-03-16 18:51:47,184 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=12908, Unknown=0, NotChecked=0, Total=13340 [2025-03-16 18:51:47,184 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 116 states, 111 states have (on average 1.5585585585585586) internal successors, (173), 74 states have internal predecessors, (173), 32 states have call successors, (32), 1 states have call predecessors, (32), 30 states have return successors, (45), 42 states have call predecessors, (45), 32 states have call successors, (45) [2025-03-16 18:51:49,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:51:49,569 INFO L93 Difference]: Finished difference Result 76 states and 104 transitions. [2025-03-16 18:51:49,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-03-16 18:51:49,569 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 111 states have (on average 1.5585585585585586) internal successors, (173), 74 states have internal predecessors, (173), 32 states have call successors, (32), 1 states have call predecessors, (32), 30 states have return successors, (45), 42 states have call predecessors, (45), 32 states have call successors, (45) Word has length 124 [2025-03-16 18:51:49,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:51:49,570 INFO L225 Difference]: With dead ends: 76 [2025-03-16 18:51:49,570 INFO L226 Difference]: Without dead ends: 61 [2025-03-16 18:51:49,571 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5271 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1905, Invalid=22275, Unknown=0, NotChecked=0, Total=24180 [2025-03-16 18:51:49,571 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 164 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 3727 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 4056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 3727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-03-16 18:51:49,572 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 977 Invalid, 4056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 3727 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-03-16 18:51:49,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2025-03-16 18:51:49,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2025-03-16 18:51:49,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 5 states have call successors, (5), 2 states have call predecessors, (5), 11 states have return successors, (22), 13 states have call predecessors, (22), 5 states have call successors, (22) [2025-03-16 18:51:49,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2025-03-16 18:51:49,578 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 124 [2025-03-16 18:51:49,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:51:49,578 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2025-03-16 18:51:49,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 111 states have (on average 1.5585585585585586) internal successors, (173), 74 states have internal predecessors, (173), 32 states have call successors, (32), 1 states have call predecessors, (32), 30 states have return successors, (45), 42 states have call predecessors, (45), 32 states have call successors, (45) [2025-03-16 18:51:49,578 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2025-03-16 18:51:49,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2025-03-16 18:51:49,579 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:51:49,579 INFO L218 NwaCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:51:49,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-16 18:51:49,780 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,SelfDestructingSolverStorable15 [2025-03-16 18:51:49,780 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:51:49,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:51:49,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1921054883, now seen corresponding path program 13 times [2025-03-16 18:51:49,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:51:49,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508628144] [2025-03-16 18:51:49,780 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 18:51:49,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:51:49,784 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 138 statements into 1 equivalence classes. [2025-03-16 18:51:49,795 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 138 of 138 statements. [2025-03-16 18:51:49,795 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:51:49,795 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:51:51,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 0 proven. 952 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2025-03-16 18:51:51,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:51:51,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508628144] [2025-03-16 18:51:51,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508628144] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:51:51,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766462332] [2025-03-16 18:51:51,837 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 18:51:51,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:51:51,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:51:51,839 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) [2025-03-16 18:51:51,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-16 18:51:51,887 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 138 statements into 1 equivalence classes. [2025-03-16 18:51:51,919 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 138 of 138 statements. [2025-03-16 18:51:51,919 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:51:51,919 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:51:51,922 WARN L254 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 229 conjuncts are in the unsatisfiable core [2025-03-16 18:51:51,924 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:51:53,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 10 proven. 513 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2025-03-16 18:51:53,388 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:51:58,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 71 proven. 881 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2025-03-16 18:51:58,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766462332] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:51:58,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:51:58,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 30, 60] total 136 [2025-03-16 18:51:58,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333099035] [2025-03-16 18:51:58,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:51:58,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2025-03-16 18:51:58,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:51:58,046 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2025-03-16 18:51:58,047 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=17867, Unknown=0, NotChecked=0, Total=18360 [2025-03-16 18:51:58,047 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand has 136 states, 131 states have (on average 1.5648854961832062) internal successors, (205), 87 states have internal predecessors, (205), 39 states have call successors, (39), 1 states have call predecessors, (39), 36 states have return successors, (50), 49 states have call predecessors, (50), 39 states have call successors, (50) [2025-03-16 18:52:01,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:52:01,173 INFO L93 Difference]: Finished difference Result 80 states and 110 transitions. [2025-03-16 18:52:01,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2025-03-16 18:52:01,174 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 131 states have (on average 1.5648854961832062) internal successors, (205), 87 states have internal predecessors, (205), 39 states have call successors, (39), 1 states have call predecessors, (39), 36 states have return successors, (50), 49 states have call predecessors, (50), 39 states have call successors, (50) Word has length 138 [2025-03-16 18:52:01,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:52:01,175 INFO L225 Difference]: With dead ends: 80 [2025-03-16 18:52:01,175 INFO L226 Difference]: Without dead ends: 64 [2025-03-16 18:52:01,177 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5999 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=2311, Invalid=29551, Unknown=0, NotChecked=0, Total=31862 [2025-03-16 18:52:01,177 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 196 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 5101 mSolverCounterSat, 524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 1312 SdHoareTripleChecker+Invalid, 5625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 524 IncrementalHoareTripleChecker+Valid, 5101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2025-03-16 18:52:01,177 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 1312 Invalid, 5625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [524 Valid, 5101 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2025-03-16 18:52:01,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-03-16 18:52:01,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2025-03-16 18:52:01,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 5 states have call successors, (5), 2 states have call predecessors, (5), 12 states have return successors, (24), 14 states have call predecessors, (24), 5 states have call successors, (24) [2025-03-16 18:52:01,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2025-03-16 18:52:01,185 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 138 [2025-03-16 18:52:01,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:52:01,185 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2025-03-16 18:52:01,185 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 131 states have (on average 1.5648854961832062) internal successors, (205), 87 states have internal predecessors, (205), 39 states have call successors, (39), 1 states have call predecessors, (39), 36 states have return successors, (50), 49 states have call predecessors, (50), 39 states have call successors, (50) [2025-03-16 18:52:01,185 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2025-03-16 18:52:01,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2025-03-16 18:52:01,186 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:52:01,186 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:52:01,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-16 18:52:01,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:52:01,387 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:52:01,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:52:01,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1260471623, now seen corresponding path program 14 times [2025-03-16 18:52:01,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:52:01,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127534686] [2025-03-16 18:52:01,387 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:52:01,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:52:01,391 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 110 statements into 2 equivalence classes. [2025-03-16 18:52:01,398 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 110 of 110 statements. [2025-03-16 18:52:01,398 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:52:01,398 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:52:02,741 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 2 proven. 574 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-03-16 18:52:02,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:52:02,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127534686] [2025-03-16 18:52:02,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127534686] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:52:02,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415405573] [2025-03-16 18:52:02,741 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:52:02,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:52:02,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:52:02,743 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:52:02,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-16 18:52:02,798 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 110 statements into 2 equivalence classes. [2025-03-16 18:52:02,818 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 110 of 110 statements. [2025-03-16 18:52:02,818 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:52:02,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:52:02,820 WARN L254 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 181 conjuncts are in the unsatisfiable core [2025-03-16 18:52:02,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:52:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 11 proven. 321 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2025-03-16 18:52:04,060 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:52:07,273 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 44 proven. 528 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2025-03-16 18:52:07,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415405573] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:52:07,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:52:07,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 32, 48] total 113 [2025-03-16 18:52:07,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754897429] [2025-03-16 18:52:07,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:52:07,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2025-03-16 18:52:07,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:52:07,275 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2025-03-16 18:52:07,276 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=12269, Unknown=0, NotChecked=0, Total=12656 [2025-03-16 18:52:07,276 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 113 states, 108 states have (on average 1.5555555555555556) internal successors, (168), 71 states have internal predecessors, (168), 31 states have call successors, (31), 1 states have call predecessors, (31), 28 states have return successors, (43), 42 states have call predecessors, (43), 31 states have call successors, (43) [2025-03-16 18:52:09,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:52:09,525 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2025-03-16 18:52:09,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-03-16 18:52:09,525 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 108 states have (on average 1.5555555555555556) internal successors, (168), 71 states have internal predecessors, (168), 31 states have call successors, (31), 1 states have call predecessors, (31), 28 states have return successors, (43), 42 states have call predecessors, (43), 31 states have call successors, (43) Word has length 110 [2025-03-16 18:52:09,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:52:09,526 INFO L225 Difference]: With dead ends: 74 [2025-03-16 18:52:09,526 INFO L226 Difference]: Without dead ends: 67 [2025-03-16 18:52:09,527 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4561 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1512, Invalid=20540, Unknown=0, NotChecked=0, Total=22052 [2025-03-16 18:52:09,527 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 209 mSDsluCounter, 1265 mSDsCounter, 0 mSdLazyCounter, 3806 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1288 SdHoareTripleChecker+Invalid, 4234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 3806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-03-16 18:52:09,527 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1288 Invalid, 4234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [428 Valid, 3806 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-03-16 18:52:09,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2025-03-16 18:52:09,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2025-03-16 18:52:09,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 40 states have internal predecessors, (41), 5 states have call successors, (5), 2 states have call predecessors, (5), 13 states have return successors, (26), 15 states have call predecessors, (26), 5 states have call successors, (26) [2025-03-16 18:52:09,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2025-03-16 18:52:09,534 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 110 [2025-03-16 18:52:09,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:52:09,534 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2025-03-16 18:52:09,535 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 108 states have (on average 1.5555555555555556) internal successors, (168), 71 states have internal predecessors, (168), 31 states have call successors, (31), 1 states have call predecessors, (31), 28 states have return successors, (43), 42 states have call predecessors, (43), 31 states have call successors, (43) [2025-03-16 18:52:09,535 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2025-03-16 18:52:09,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2025-03-16 18:52:09,535 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:52:09,535 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 22, 20, 20, 20, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:52:09,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-16 18:52:09,736 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-16 18:52:09,736 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:52:09,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:52:09,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1829205921, now seen corresponding path program 15 times [2025-03-16 18:52:09,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:52:09,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858705827] [2025-03-16 18:52:09,736 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 18:52:09,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:52:09,741 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 159 statements into 26 equivalence classes. [2025-03-16 18:52:09,767 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) and asserted 159 of 159 statements. [2025-03-16 18:52:09,769 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2025-03-16 18:52:09,769 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:52:11,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1535 backedges. 272 proven. 894 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2025-03-16 18:52:11,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:52:11,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858705827] [2025-03-16 18:52:11,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858705827] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:52:11,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825171083] [2025-03-16 18:52:11,732 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 18:52:11,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:52:11,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:52:11,734 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:52:11,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-16 18:52:11,800 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 159 statements into 26 equivalence classes. [2025-03-16 18:52:11,855 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) and asserted 159 of 159 statements. [2025-03-16 18:52:11,855 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2025-03-16 18:52:11,855 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:52:11,860 WARN L254 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 265 conjuncts are in the unsatisfiable core [2025-03-16 18:52:11,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:52:13,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1535 backedges. 12 proven. 694 refuted. 0 times theorem prover too weak. 829 trivial. 0 not checked. [2025-03-16 18:52:13,259 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:52:18,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1535 backedges. 83 proven. 1217 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2025-03-16 18:52:18,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825171083] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:52:18,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:52:18,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 34, 69] total 139 [2025-03-16 18:52:18,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462550930] [2025-03-16 18:52:18,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:52:18,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2025-03-16 18:52:18,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:52:18,936 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2025-03-16 18:52:18,938 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=18673, Unknown=0, NotChecked=0, Total=19182 [2025-03-16 18:52:18,939 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 139 states, 136 states have (on average 1.5220588235294117) internal successors, (207), 84 states have internal predecessors, (207), 35 states have call successors, (35), 1 states have call predecessors, (35), 41 states have return successors, (56), 55 states have call predecessors, (56), 35 states have call successors, (56) [2025-03-16 18:52:22,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:52:22,309 INFO L93 Difference]: Finished difference Result 88 states and 122 transitions. [2025-03-16 18:52:22,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2025-03-16 18:52:22,309 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 136 states have (on average 1.5220588235294117) internal successors, (207), 84 states have internal predecessors, (207), 35 states have call successors, (35), 1 states have call predecessors, (35), 41 states have return successors, (56), 55 states have call predecessors, (56), 35 states have call successors, (56) Word has length 159 [2025-03-16 18:52:22,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:52:22,310 INFO L225 Difference]: With dead ends: 88 [2025-03-16 18:52:22,310 INFO L226 Difference]: Without dead ends: 70 [2025-03-16 18:52:22,312 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7294 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=2283, Invalid=32127, Unknown=0, NotChecked=0, Total=34410 [2025-03-16 18:52:22,312 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 249 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 5256 mSolverCounterSat, 515 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 5771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 515 IncrementalHoareTripleChecker+Valid, 5256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2025-03-16 18:52:22,313 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 1168 Invalid, 5771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [515 Valid, 5256 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2025-03-16 18:52:22,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2025-03-16 18:52:22,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 61. [2025-03-16 18:52:22,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 41 states have (on average 1.048780487804878) internal successors, (43), 42 states have internal predecessors, (43), 5 states have call successors, (5), 2 states have call predecessors, (5), 14 states have return successors, (28), 16 states have call predecessors, (28), 5 states have call successors, (28) [2025-03-16 18:52:22,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2025-03-16 18:52:22,319 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 159 [2025-03-16 18:52:22,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:52:22,320 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2025-03-16 18:52:22,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 136 states have (on average 1.5220588235294117) internal successors, (207), 84 states have internal predecessors, (207), 35 states have call successors, (35), 1 states have call predecessors, (35), 41 states have return successors, (56), 55 states have call predecessors, (56), 35 states have call successors, (56) [2025-03-16 18:52:22,320 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2025-03-16 18:52:22,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2025-03-16 18:52:22,321 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:52:22,321 INFO L218 NwaCegarLoop]: trace histogram [24, 24, 24, 22, 22, 22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:52:22,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-16 18:52:22,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:52:22,521 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:52:22,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:52:22,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1649730235, now seen corresponding path program 16 times [2025-03-16 18:52:22,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:52:22,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70699376] [2025-03-16 18:52:22,522 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 18:52:22,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:52:22,528 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 173 statements into 2 equivalence classes. [2025-03-16 18:52:22,537 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 173 of 173 statements. [2025-03-16 18:52:22,537 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 18:52:22,538 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:52:24,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1842 backedges. 68 proven. 923 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2025-03-16 18:52:24,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:52:24,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70699376] [2025-03-16 18:52:24,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70699376] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:52:24,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301772421] [2025-03-16 18:52:24,870 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 18:52:24,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:52:24,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:52:24,872 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:52:24,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-16 18:52:24,949 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 173 statements into 2 equivalence classes. [2025-03-16 18:52:24,982 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 173 of 173 statements. [2025-03-16 18:52:24,982 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 18:52:24,982 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:52:24,986 WARN L254 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 289 conjuncts are in the unsatisfiable core [2025-03-16 18:52:25,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:52:26,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1842 backedges. 13 proven. 829 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2025-03-16 18:52:26,667 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:52:33,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1842 backedges. 92 proven. 1470 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2025-03-16 18:52:33,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301772421] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:52:33,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:52:33,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 36, 75] total 147 [2025-03-16 18:52:33,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159908524] [2025-03-16 18:52:33,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:52:33,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2025-03-16 18:52:33,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:52:33,440 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2025-03-16 18:52:33,441 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=20862, Unknown=0, NotChecked=0, Total=21462 [2025-03-16 18:52:33,442 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand has 147 states, 143 states have (on average 1.3776223776223777) internal successors, (197), 85 states have internal predecessors, (197), 28 states have call successors, (28), 1 states have call predecessors, (28), 47 states have return successors, (63), 62 states have call predecessors, (63), 28 states have call successors, (63)